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#1676 2022-12-27 08:20:06

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/01 Sunday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: Today is New Year's Day on Mars.  Omission of Friday in Month 24 reduced days gap from 3 to 2

Today on Earth: 2022/12/27 Tuesday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 000.2 Sol Number: 001  Change in degrees is +.5 Julian date is: J0037001 << New Year's Day on Mars
Solar Longitude: 359.7 Sol Number: 668  Change in degrees is +.5 Julian date is: J0036668 << New Year's Eve on Mars  << Day length extended
Solar Longitude: 359.2 Sol Number: 667  Change in degrees is +.5 Julian date is: J0036667
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   233,191,321 km [23,6 km/s] Difference is +184717 <= 7697 km/hour at 08.0 on 12/27 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   233,006,604 km [23,6 km/s] Difference is +185457 <= 7727 km/hour at 08.0 on 12/26 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   232,821,147 km [23,6 km/s] Difference is +185892 <= 7746 km/hour at 08.0 on 12/25 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
Next up: HIP 20834 Mg 9.34 RA 04h 27m 52.7s below path Day 0 just inside right border
Pair of stars form gate across path at RA 04h 28m 50.5 s Day 0 at right border Day 1 inside 29 hour marker
Trapazoid asterism in the path at RA 04h 30m 09.0s trapazoid with wingmen - Day 1 at 14 hour marker - Day 2 just past Mars
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/12/27 91,978,143 (increasing)
Earth Distance 2022/12/26 91,110,233 (increasing)
Earth Distance 2022/12/25 90,397,928 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 001 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 001 is Sunday  in the Proposed Business calendar for Mars.  Sol 666 was a skip day on Earth. Year 37 Sol 17 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 37.

The last Skip Day occurred  December 24,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected January 17, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1677 2022-12-28 07:26:02

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/02 Monday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2022/12/28 Wednesday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 000.7 Sol Number: 002  Change in degrees is +.5 Julian date is: J0037002
Solar Longitude: 000.2 Sol Number: 001  Change in degrees is +.5 Julian date is: J0037001 << New Year's Day on Mars
Solar Longitude: 359.7 Sol Number: 668  Change in degrees is +.5 Julian date is: J0036668 << New Year's Eve on Mars  << Day length extended
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   233,375,724 km [23,6 km/s] Difference is +184403 <= 7683 km/hour at 08.0 on 12/28 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   233,191,321 km [23,6 km/s] Difference is +184717 <= 7697 km/hour at 08.0 on 12/27 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   233,006,604 km [23,6 km/s] Difference is +185457 <= 7727 km/hour at 08.0 on 12/26 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
HIP 20834 Mg 9.34 RA 04h 27m 52.7s below path Day 0 just inside right border - Day 1 below 31 hour marker
Pair of stars form gate across path at RA 04h 28m 50.5 s Day 0 at right border Day 1 inside 29 hour marker - Day 2 right at Mars
Trapazoid asterism in the path at RA 04h 30m 09.0s trapazoid with wingmen - Day 1 at 14 hour marker - Day 2 just past Mars - Day 3 at 11 hour marker
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/12/28 92,637,652 (increasing)
Earth Distance 2022/12/27 91,978,143 (increasing)
Earth Distance 2022/12/26 91,110,233 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 002 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 002 is Monday  in the Proposed Business calendar for Mars.  Sol 666 was a skip day on Earth. Year 37 Sol 17 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org this occurred February 7, 2021 (on Earth). Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  December 24,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected January 17, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1678 2022-12-29 08:03:27

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/03 Tuesday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2022/12/29 Thursday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 001.2 Sol Number: 003  Change in degrees is +.5 Julian date is: J0037003
Solar Longitude: 000.7 Sol Number: 002  Change in degrees is +.5 Julian date is: J0037002
Solar Longitude: 000.2 Sol Number: 001  Change in degrees is +.5 Julian date is: J0037001 << New Year's Day on Mars
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   233,559,163 km [23,5 km/s] Difference is +183439 <= 7643 km/hour at 08.0 on 12/29 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   233,375,724 km [23,6 km/s] Difference is +184403 <= 7683 km/hour at 08.0 on 12/28 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   233,191,321 km [23,6 km/s] Difference is +184717 <= 7697 km/hour at 08.0 on 12/27 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
Next up: Galaxy PGC 2817404 RA 04h 26m 16.1s Well above path - Day 0 at far right of view
HIP 20834 Mg 9.34 RA 04h 27m 52.7s below path Day 0 just inside right border - Day 1 below 31 hour marker - Day 2 just ahead of Mars
Pair of stars form gate across path at RA 04h 28m 50.5 s Day 0 at right border Day 1 inside 29 hour marker - Day 2 right at Mars - Day 3 past 17 hour marker
Trapazoid asterism in the path at RA 04h 30m 09.0s trapazoid with wingmen - Day 1 at 14 hour marker - Day 2 just past Mars - Day 4 still visible at far left
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/12/29 93,463,045 (increasing)
Earth Distance 2022/12/28 92,637,652 (increasing)
Earth Distance 2022/12/27 91,978,143 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 003 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 003 is Tuesday  in the Proposed Business calendar for Mars.  Sol 666 was a skip day on Earth. Year 37 Sol 17 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org this occurred February 7, 2021 (on Earth). Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  December 24,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected January 17, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1679 2022-12-30 08:10:27

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/04 Wednesday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2022/12/30 Friday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 001.7 Sol Number: 004  Change in degrees is +.5 Julian date is: J0037004
Solar Longitude: 001.2 Sol Number: 003  Change in degrees is +.5 Julian date is: J0037003
Solar Longitude: 000.7 Sol Number: 002  Change in degrees is +.5 Julian date is: J0037002
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   233,742,207 km [23,5 km/s] Difference is +183044 <= 7627 km/hour at 08.0 on 12/30 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   233,559,163 km [23,5 km/s] Difference is +183439 <= 7643 km/hour at 08.0 on 12/29 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   233,375,724 km [23,6 km/s] Difference is +184403 <= 7683 km/hour at 08.0 on 12/28 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
Next up: TYC 1820-1131-1 Mg 11.02 RA 04h 24m 40.7s Day 0 at far right of view
Galaxy PGC 2817404 RA 04h 26m 16.1s Well above path - Day 0 at far right of view - Day 1 above 35 hour marker
HIP 20834 Mg 9.34 RA 04h 27m 52.7s below path Day 0  - Day 1 below 31 hour marker - Day 2 just ahead of Mars - Day 3 below 17.5 hour marker
Pair of stars form gate across path at RA 04h 28m 50.5 s Day 0 at right border Day 1 inside 29 hour marker - Day 2 right at Mars - Day 4 still there at far left
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/12/30 94,292,888 (increasing)
Earth Distance 2022/12/29 93,463,045 (increasing)
Earth Distance 2022/12/28 92,637,652 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 004 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 004 is Wednesday  in the Proposed Business calendar for Mars.  Sol 666 was a skip day on Earth. Year 37 Sol 17 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org this occurred February 7, 2021 (on Earth). Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  December 24,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected January 17, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1680 2022-12-31 10:20:50

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/05 Thursday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One day note: This is political New Year's day on Earth.  The astronomical New Years occurred several Earth days ago.

Today on Earth: 2022/12/31 Saturday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 002.1 Sol Number: 005  Change in degrees is +.4 Julian date is: J0037005
Solar Longitude: 001.7 Sol Number: 004  Change in degrees is +.5 Julian date is: J0037004
Solar Longitude: 001.2 Sol Number: 003  Change in degrees is +.5 Julian date is: J0037003
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   233,924,650 km [23,5 km/s] Difference is +182443 <= 7602 km/hour at 08.0 on 12/31 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   233,742,207 km [23,5 km/s] Difference is +183044 <= 7627 km/hour at 08.0 on 12/30 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   233,559,163 km [23,5 km/s] Difference is +183439 <= 7643 km/hour at 08.0 on 12/29 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
TYC 1820-1131-1 Mg 11.02 RA 04h 24m 40.7s Day 0 at far right of view - Day 1 still there
Galaxy PGC 2817404 RA 04h 26m 16.1s Well above path - Day 0 at far right of view - Day 1 above 35 hour marker - Day 2 above Mars
HIP 20834 Mg 9.34 RA 04h 27m 52.7s below path Day 0  - Day 1 below 31 hour marker - Day 2 just ahead of Mars - Day 4 below 40 hour marker
Pair of stars form gate across path at RA 04h 28m 50.5 s Day 0 at right border Day 1 inside 29 hour marker - Day 2 right at Mars - Day 5 still there at far left
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/12/31 95,227,888 (increasing)
Earth Distance 2022/12/30 94,292,888 (increasing)
Earth Distance 2022/12/29 93,463,045 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 005 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 005 is Thursday  in the Proposed Business calendar for Mars.  Sol 666 was a skip day on Earth. Year 37 Sol 17 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org this occurred February 7, 2021 (on Earth). Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  December 24,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected January 17, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1681 2023-01-01 10:59:32

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/06 Friday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One day note: This is political New Year's day on Earth.  The astronomical New Years occurred several Earth days ago.

Today on Earth: 2023/01/01 Sunday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 002.6 Sol Number: 006  Change in degrees is +.5 Julian date is: J0037006
Solar Longitude: 002.1 Sol Number: 005  Change in degrees is +.4 Julian date is: J0037005
Solar Longitude: 001.7 Sol Number: 004  Change in degrees is +.5 Julian date is: J0037004
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   234,106,477 km [23,5 km/s] Difference is +181827 <= 7576 km/hour at 08.0 on 01/01 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   233,924,650 km [23,5 km/s] Difference is +182443 <= 7602 km/hour at 08.0 on 12/31 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   233,742,207 km [23,5 km/s] Difference is +183044 <= 7627 km/hour at 08.0 on 12/30 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
Next up: A single mini-Boomer arrived at the far right: HIP 20491 Day 0 just below path and at far right of view
Next up: Two mini-Boomers jointed the party: HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker
TYC 1820-1131-1 Mg 11.02 RA 04h 24m 40.7s Day 0 at far right of view - Day 1 still there Day 2 above 42 hour marker ahead of Mars
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/01/01 96,127,777 (increasing)
Earth Distance 2022/12/31 95,227,888 (increasing)
Earth Distance 2022/12/30 94,292,888 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 006 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 006 is Friday  in the Proposed Business calendar for Mars.  Sol 666 was a skip day on Earth. Year 37 Sol 17 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org this occurred February 7, 2021 (on Earth). Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  December 24,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected January 17, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1682 2023-01-02 07:35:15

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/07 Saturday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/01/02 Monday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 003.1 Sol Number: 007  Change in degrees is +.5 Julian date is: J0037007
Solar Longitude: 002.6 Sol Number: 006  Change in degrees is +.5 Julian date is: J0037006
Solar Longitude: 002.1 Sol Number: 005  Change in degrees is +.4 Julian date is: J0037005
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   234,287,677 km [23,5 km/s] Difference is +181200 <= 7550 km/hour at 08.0 on 01/02 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   234,106,477 km [23,5 km/s] Difference is +181827 <= 7576 km/hour at 08.0 on 01/01 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   233,924,650 km [23,5 km/s] Difference is +182443 <= 7602 km/hour at 08.0 on 12/31 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
HIP 20491 Day 0 just below path and at far right of view - Day 1 still at far right
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 1 below 48 hour marker
TYC 1820-1131-1 Mg 11.02 RA 04h 24m 40.7s Day 0 at far right of view - Day 1 still there Day 3 above 24 hour marker ahead of Mars
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/01/02 96,899,999 (increasing)
Earth Distance 2022/01/01 96,127,777 (increasing)
Earth Distance 2022/12/31 95,227,888 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 007 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 007 is Saturday  in the Proposed Business calendar for Mars.  Sol 666 was a skip day on Earth. Year 37 Sol 17 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org this occurred February 7, 2021 (on Earth). Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  December 24,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected January 17, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1683 2023-01-03 10:14:27

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/08 Sunday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/01/03 Tuesday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 003.6 Sol Number: 008  Change in degrees is +.5 Julian date is: J0037008
Solar Longitude: 003.1 Sol Number: 007  Change in degrees is +.5 Julian date is: J0037007
Solar Longitude: 002.6 Sol Number: 006  Change in degrees is +.5 Julian date is: J0037006
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   234,468,317 km [23,4 km/s] Difference is +180640 <= 7527 km/hour at 08.0 on 01/03 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   234,287,677 km [23,5 km/s] Difference is +181200 <= 7550 km/hour at 08.0 on 01/02 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   234,106,477 km [23,5 km/s] Difference is +181827 <= 7576 km/hour at 08.0 on 01/01 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
Next up: TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker
HIP 20491 Day 0 just below path and at far right of view - Day 1 still at far right - Day 2 below 52 hours ahead marker
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 1 below 48 hour marker - Day 2 still ahead of Mars
TYC 1820-1131-1 Mg 11.02 RA 04h 24m 40.7s Day 0 at far right of view - Day 1 still there Day 4 above and a bit past Mars
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/01/03 97,905,921 (increasing)
Earth Distance 2022/01/02 96,899,999 (increasing)
Earth Distance 2022/01/01 96,127,777 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 008 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 008 is Sunday  in the Proposed Business calendar for Mars.  Sol 666 was a skip day on Earth. Year 37 Sol 17 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org this occurred February 7, 2021 (on Earth). Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  December 24,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected January 17, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1684 2023-01-04 07:39:57

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/09 Monday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/01/04 Wednesday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 004.1 Sol Number: 009  Change in degrees is +.5 Julian date is: J0037009
Solar Longitude: 003.6 Sol Number: 008  Change in degrees is +.5 Julian date is: J0037008
Solar Longitude: 003.1 Sol Number: 007  Change in degrees is +.5 Julian date is: J0037007
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   234,648,116 km [23,4 km/s] Difference is +179799 <= 7593 km/hour at 08.0 on 01/04 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   234,468,317 km [23,4 km/s] Difference is +180640 <= 7527 km/hour at 08.0 on 01/03 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   234,287,677 km [23,5 km/s] Difference is +181200 <= 7550 km/hour at 08.0 on 01/02 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 1 above 59 hour marker ahead
HIP 20491 Day 0 just below path and at far right of view - Day 1 still at far right - Day 2 below 52 hours ahead marker - Day 3 below 29.5 hour marker ahead
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 1 below 48 hour marker - Day 3 still ahead of Mars
TYC 1820-1131-1 Mg 11.02 RA 04h 24m 40.7s Day 0 at far right of view - Day 1 still there Day 5 above 29.5 hour marker past Mars
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/01/04 98,758,488 (increasing)
Earth Distance 2022/01/03 97,905,921 (increasing)
Earth Distance 2022/01/02 96,899,999 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 009 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 009 is Monday  in the Proposed Business calendar for Mars.  Sol 666 was a skip day on Earth. Year 37 Sol 17 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org this occurred February 7, 2021 (on Earth). Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  December 24,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected January 17, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1685 2023-01-05 07:42:13

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/10 Tuesday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/01/05 Thursday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 004.6 Sol Number: 010  Change in degrees is +.5 Julian date is: J0037010
Solar Longitude: 004.1 Sol Number: 009  Change in degrees is +.5 Julian date is: J0037009
Solar Longitude: 003.6 Sol Number: 008  Change in degrees is +.5 Julian date is: J0037008
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   234,827,464 km [23,4 km/s] Difference is +179348 <= 7473 km/hour at 08.0 on 01/05 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   234,648,116 km [23,4 km/s] Difference is +179799 <= 7593 km/hour at 08.0 on 01/04 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   234,468,317 km [23,4 km/s] Difference is +180640 <= 7527 km/hour at 08.0 on 01/03 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 1 above 59 hour marker ahead
HIP 20491 Day 0 just below path and at far right of view - Day 1 still at far right - Day 2 below 52 hours ahead marker - Day 3 below 29.5 hour marker ahead
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 1 below 48 hour marker - Day 3 still ahead of Mars
TYC 1820-1131-1 Mg 11.02 RA 04h 24m 40.7s Day 0 at far right of view - Day 1 still there Day 5 above 29.5 hour marker past Mars
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/01/05 99,719,897 (increasing)
Earth Distance 2022/01/04 98,758,488 (increasing)
Earth Distance 2022/01/03 97,905,921 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 010 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 010 is Tuesday  in the Proposed Business calendar for Mars.  Sol 666 was a skip day on Earth. Year 37 Sol 17 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  December 24,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected January 17, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1686 2023-01-06 07:56:04

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/11 Wednesday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/01/06 Friday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 005.1 Sol Number: 011  Change in degrees is +.5 Julian date is: J0037011
Solar Longitude: 004.6 Sol Number: 010  Change in degrees is +.5 Julian date is: J0037010
Solar Longitude: 004.1 Sol Number: 009  Change in degrees is +.5 Julian date is: J0037009
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   235,006,103 km [23,4 km/s] Difference is +178639 <= 7443 km/hour at 08.0 on 01/06 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   234,827,464 km [23,4 km/s] Difference is +179348 <= 7473 km/hour at 08.0 on 01/05 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   234,648,116 km [23,4 km/s] Difference is +179799 <= 7593 km/hour at 08.0 on 01/04 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 1 above 59 hour marker ahead Day 2 above Mars
HIP 20491 Day 0 just below path and at far right of view - Day 1 still at far right - Day 2 below 52 hours ahead marker - Day 4 below Mars
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 1 below 48 hour marker - Day 4 now behind Mars
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/01/06 100,710,564 (increasing)
Earth Distance 2022/01/05  99,719,897 (increasing)
Earth Distance 2022/01/04  98,758,488 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 011 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 011 is Wednesday  in the Proposed Business calendar for Mars.  Sol 666 was a skip day on Earth. Year 37 Sol 17 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  December 24,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected January 17, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1687 2023-01-07 07:20:33

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/12 Thursday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/01/07 Saturday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 005.6 Sol Number: 012  Change in degrees is +.5 Julian date is: J0037012
Solar Longitude: 005.1 Sol Number: 011  Change in degrees is +.5 Julian date is: J0037011
Solar Longitude: 004.6 Sol Number: 010  Change in degrees is +.5 Julian date is: J0037010
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   235,183,732 km [23,4 km/s] Difference is +177629 <= 7401 km/hour at 08.0 on 01/07 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   235,006,103 km [23,4 km/s] Difference is +178639 <= 7443 km/hour at 08.0 on 01/06 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   234,827,464 km [23,4 km/s] Difference is +179348 <= 7473 km/hour at 08.0 on 01/05 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 1 above 59 hour marker ahead Day 3 above Mars
HIP 20491 Day 0 just below path and at far right of view - Day 1 still at far right - Day 2 below 52 hours ahead marker - Day 5 past Mars
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 1 below 48 hour marker - Day 5 behind Mars and past 45.5 marker
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/01/06 100,710,564 (increasing)
Earth Distance 2022/01/05  99,719,897 (increasing)
Earth Distance 2022/01/04  98,758,488 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 012 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 012 is Thursday  in the Proposed Business calendar for Mars.  Sol 666 was a skip day on Earth. Year 37 Sol 17 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  December 24,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected January 17, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1688 2023-01-08 07:47:54

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/12 Thursday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day note: Skip day is computed by the web site theskylive.com.  It is once again early, as a new Astronomical year begins. Next is February 14 on Earth
The short skip interval of 15 days at the beginning of an Astronomical Year is consistent at theskylive.com.
My guess is that the programmers restart the skip counter at the start of an Astronomical Year to avoid error propagation from the previous cycle.

Today on Earth: 2023/01/08 Sunday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 006.1 Sol Number: 012  Change in degrees is +.5 Julian date is: J0037012 <<== Early skip day at start of Astronomical year
Solar Longitude: 005.6 Sol Number: 012  Change in degrees is +.5 Julian date is: J0037012
Solar Longitude: 005.1 Sol Number: 011  Change in degrees is +.5 Julian date is: J0037011
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   235,360,878 km [23,4 km/s] Difference is +177146 <= 7381 km/hour at 08.0 on 01/08 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   235,183,732 km [23,4 km/s] Difference is +177629 <= 7401 km/hour at 08.0 on 01/07 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   235,006,103 km [23,4 km/s] Difference is +178639 <= 7443 km/hour at 08.0 on 01/06 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began. [2023/01/08 entering steady state]
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 1 ahead Day 4 above and past Mars
HIP 20491 Day 0 just below path and at far right of view - Day 1 still at far right - Day 2 below 52 hours ahead marker - Day 6 past 57 hour marker
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 1 below 48 hour marker - Day 6 behind Mars and past 57 marker
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/01/08 102,717,445 (increasing) [missed 2022/01/07]
Earth Distance 2022/01/06 100,710,564 (increasing)
Earth Distance 2022/01/05  99,719,897 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 012 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 012 is Thursday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  January 8, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected February 14, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1689 2023-01-10 07:35:16

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/14 Saturday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/01/10 Tuesday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 007.1 Sol Number: 014  Change in degrees is +.5 Julian date is: J0037014
Solar Longitude: 006.6 Sol Number: 013  Change in degrees is +.5 Julian date is: J0037013
Solar Longitude: 006.1 Sol Number: 012  Change in degrees is +.5 Julian date is: J0037012 <<== Early skip day at start of Astronomical year
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   235,713,019 km [23.3 km/s] Difference is +175706 <= 7321 km/hour at 08.0 on 01/10 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   235,537,313 km [23.3 km/s] Difference is +176435 <= 7351 km/hour at 08.0 on 01/09 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   235,360,878 km [23.4 km/s] Difference is +177146 <= 7381 km/hour at 08.0 on 01/08 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began. [2023/01/08 entering steady state]
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 1 ahead Day 6 above 72 marker past Mars
HIP 20491 Day 0 just below path and at far right of view - Day 1 still at far right - Day 2 below 52 hours ahead marker - Day 8 past 72 hour marker
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 1 below 48 hour marker - Day 8 behind Mars and past 72 marker
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2022/12/27, the curve of the path intersects the right border as Retrograde Movement continues

---
Earth Distance 2022/01/10 104,809,631 (increasing)
Earth Distance 2022/01/09 103,934,300 (increasing)
Earth Distance 2022/01/08 102,717,445 (increasing) [missed 2022/01/07]
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 014 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 014 is Saturday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  January 8, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected February 14, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Offline

#1690 2023-01-11 08:46:37

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/15 Sunday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Retrograde Movement of Mars is coming to an end. The transition may be seen at theskylive.com/mars-tracker

Today on Earth: 2023/01/11 Wednesday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 007.6 Sol Number: 015  Change in degrees is +.5 Julian date is: J0037015
Solar Longitude: 007.1 Sol Number: 014  Change in degrees is +.5 Julian date is: J0037014
Solar Longitude: 006.6 Sol Number: 013  Change in degrees is +.5 Julian date is: J0037013
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   235,887,978 km [23.3 km/s] Difference is +174959 <= 7290 km/hour at 08.0 on 01/11 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   235,713,019 km [23.3 km/s] Difference is +175706 <= 7321 km/hour at 08.0 on 01/10 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   235,537,313 km [23.3 km/s] Difference is +176435 <= 7351 km/hour at 08.0 on 01/09 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began. [2023/01/08 entering steady state]
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 1 ahead Day 7 above 72 marker past Mars
HIP 20491 Day 0 just below path and at far right of view - Day 1 still at far right - Day 2 below 52 hours ahead marker - Day 9 past 72 hour marker
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 1 below 48 hour marker - Day 9 behind Mars and past 144 marker
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2023/01/11, the curve of the path no longer intersects the right border, and it has returned to regular movement to the left border

---
Earth Distance 2022/01/11 104,939,483 (increasing)
Earth Distance 2022/01/10 104,809,631 (increasing)
Earth Distance 2022/01/09 103,934,300 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 015 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 015 is Sunday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  January 8, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected February 14, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1691 2023-01-12 07:28:24

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/16 Monday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Retrograde Movement of Mars is coming to an end. RA 04h 22m 05.4s holding steady

Today on Earth: 2023/01/12 Thursday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 008.0 Sol Number: 016  Change in degrees is +.4 Julian date is: J0037016
Solar Longitude: 007.6 Sol Number: 015  Change in degrees is +.5 Julian date is: J0037015
Solar Longitude: 007.1 Sol Number: 014  Change in degrees is +.5 Julian date is: J0037014
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   236,062,170 km [23.3 km/s] Difference is +174192 <= 7258 km/hour at 08.0 on 01/12 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   235,887,978 km [23.3 km/s] Difference is +174959 <= 7290 km/hour at 08.0 on 01/11 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   235,713,019 km [23.3 km/s] Difference is +175706 <= 7321 km/hour at 08.0 on 01/10 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars is in Retrograde Movement as seen from Earth. On 2022/10/30 the movement began. [2023/01/08 entering steady state]
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 8 above 144 hour marker heading left
HIP 20491 Day 0 just below path and at far right of view - Day 9 past 72 hour marker Day 10 ahead of 144 hour marker heading left
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 10 behind Mars and ahead of 144 marker heading left
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2023/01/11, the curve of the path no longer intersects the right border, and it has returned to regular movement to the left border

---
Earth Distance 2022/01/12 106,970,900 (increasing)
Earth Distance 2022/01/11 105,939,483 (increasing)
Earth Distance 2022/01/10 104,809,631 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 5 and 6 minutes. Communications delay would be 10+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Movement of Mars as seen from Earth is now to right (decreasing RA) 2022/11/05.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 016 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 016 is Monday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  January 8, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected February 14, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1692 2023-01-13 08:00:49

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/17 Tuesday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Retrograde Movement of Mars has ended. RA 04h 22m 06.7s vs yesterday's RA 04h 22m 05.4s

Today on Earth: 2023/01/13 Friday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 008.5 Sol Number: 017  Change in degrees is +.5 Julian date is: J0037017
Solar Longitude: 008.0 Sol Number: 016  Change in degrees is +.4 Julian date is: J0037016
Solar Longitude: 007.6 Sol Number: 015  Change in degrees is +.5 Julian date is: J0037015
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   236,235,614 km [23.3 km/s] Difference is +173444 <= 7227 km/hour at 08.0 on 01/13 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   236,062,170 km [23.3 km/s] Difference is +174192 <= 7258 km/hour at 08.0 on 01/12 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   235,887,978 km [23.3 km/s] Difference is +174959 <= 7290 km/hour at 08.0 on 01/11 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars is in Retrograde Movement as seen from Earth. On 2022/10/30 the movement began. [2023/01/08 entering steady state]
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 8 above 144 hour marker heading left
HIP 20491 Day 0 just below path and at far right of view - Day 9 past 72 hour marker Day 10 ahead of 144 hour marker heading left
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 10 behind Mars and ahead of 144 marker heading left
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right at a slight downward inclination
As of 2023/01/11, the curve of the path no longer intersects the right border, and it has returned to regular movement to the left border

---
Earth Distance 2022/01/13 108,100,644 (increasing)
Earth Distance 2022/01/12 106,970,900 (increasing)
Earth Distance 2022/01/11 105,939,483 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 6 and 7 minutes. Communications delay would be 12+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 017 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 017 is Tuesday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  January 8, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected February 14, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1693 2023-01-14 07:50:28

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/18 Wednesday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Regular Movement of Mars is under way. RA 04h 22m 10.8s vs Yesterday's 06.7s

Today on Earth: 2023/01/14 Saturday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 009.0 Sol Number: 018  Change in degrees is +.5 Julian date is: J0037018
Solar Longitude: 008.5 Sol Number: 017  Change in degrees is +.5 Julian date is: J0037017
Solar Longitude: 008.0 Sol Number: 016  Change in degrees is +.4 Julian date is: J0037016
---

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

---
Distance: Mars >> Sun per theskylive.com:   236,408,305 km [23.2 km/s] Difference is +172691 <= 7195 km/hour at 08.0 on 01/14 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   236,235,614 km [23.3 km/s] Difference is +173444 <= 7227 km/hour at 08.0 on 01/13 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   236,062,170 km [23.3 km/s] Difference is +174192 <= 7258 km/hour at 08.0 on 01/12 (time 8:00) <<== 24.0 hours
---

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

--- Mars is in Regular Movement as seen from Earth. [2023/01/08 entering steady state] [2023/01/14 clearly back in regular movement
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 9 above 144 hour marker heading left
HIP 20491 Day 0 just below path and at far right of view - Day 9 past 72 hour marker Day 11 ahead of 144 hour marker heading left
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 11 ahead of Mars and ahead of 144 marker heading left
--- 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path no longer intersects the right border, and it has returned to regular movement to the left border

---
Earth Distance 2022/01/14 109,221,882 (increasing)
Earth Distance 2022/01/13 108,100,644 (increasing)
Earth Distance 2022/01/12 106,970,900 (increasing)
---

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 6 and 7 minutes. Communications delay would be 12+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

---

Sol 018 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 018 is Wednesday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  January 8, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected February 14, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1694 2023-01-15 07:34:47

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/19 Thursday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Regular Movement of Mars is under way. RA 04h 22m 18.0s vs Yesterday's 10.8s

Today on Earth: 2023/01/15 Sunday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 009.5 Sol Number: 019  Change in degrees is +.5 Julian date is: J0037019
Solar Longitude: 009.0 Sol Number: 018  Change in degrees is +.5 Julian date is: J0037018
Solar Longitude: 008.5 Sol Number: 017  Change in degrees is +.5 Julian date is: J0037017
===

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

===
Distance: Mars >> Sun per theskylive.com:   236,580,165 km [23.2 km/s] Difference is +171860 <= 7161 km/hour at 08.0 on 01/15 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   236,408,305 km [23.2 km/s] Difference is +172691 <= 7195 km/hour at 08.0 on 01/14 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   236,235,614 km [23.3 km/s] Difference is +173444 <= 7227 km/hour at 08.0 on 01/13 (time 8:00) <<== 24.0 hours
===

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular Movement as seen from Earth. [2023/01/08 entering steady state] [2023/01/14 clearly back in regular movement
Next up: TYC 1820-888-1 Mg 11.05 well ahead of Mars at RA 04h 24m 38.1s Day 0 ahead of 144 hour marker
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 10 above 72 hour marker heading left
HIP 20491 Day 0 just below path and at far right of view - Day 9 past 72 hour marker Day 12 inside 144 hour marker heading left
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 12 ahead of Mars and inside 144 marker heading left
=== 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path no longer intersects the right border, and it has returned to regular movement to the left border

===
Earth Distance 2022/01/15 110,351,455 (increasing)
Earth Distance 2022/01/14 109,221,882 (increasing)
Earth Distance 2022/01/13 108,100,644 (increasing)
===

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 6 and 7 minutes. Communications delay would be 12+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Update 2022/10/23 According to www.hercampus.com, Retrograde movement began October 30, 2022.
Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===

Sol 019 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 019 is Thursday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  January 8, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected February 14, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1695 2023-01-16 09:02:29

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/20 Friday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Regular Movement of Mars is under way. RA 04h 22m 23.3s vs Yesterday's 18.0s

Today on Earth: 2023/01/16 Monday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 010.0 Sol Number: 020  Change in degrees is +.5 Julian date is: J0037020
Solar Longitude: 009.5 Sol Number: 019  Change in degrees is +.5 Julian date is: J0037019
Solar Longitude: 009.0 Sol Number: 018  Change in degrees is +.5 Julian date is: J0037018
===

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

===
Distance: Mars >> Sun per theskylive.com:   236,751,298 km [23.2 km/s] Difference is +171133 <= 7131 km/hour at 08.0 on 01/16 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   236,580,165 km [23.2 km/s] Difference is +171860 <= 7161 km/hour at 08.0 on 01/15 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   236,408,305 km [23.2 km/s] Difference is +172691 <= 7195 km/hour at 08.0 on 01/14 (time 8:00) <<== 24.0 hours
===

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular Movement as seen from Earth. [2023/01/08 entering steady state] [2023/01/14 clearly back in regular movement
TYC 1820-888-1 Mg 11.05 well ahead of Mars at RA 04h 24m 38.1s Day 1 ahead of 72 hour marker and just behind 144 hour marker
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 11 above and past 72 hour marker heading left
HIP 20491 Day 0 just below path and at far right of view - Day 9 past 72 hour marker Day 13 inside 144 hour marker heading left
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 13 ahead of Mars and outside 72 marker heading left
=== 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path no longer intersects the right border, and it has returned to regular movement to the left border

===
Earth Distance 2022/01/16 111,577,824 (increasing)
Earth Distance 2022/01/15 110,351,455 (increasing)
Earth Distance 2022/01/14 109,221,882 (increasing)
===

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 6 and 7 minutes. Communications delay would be 12+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===

Sol 020 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 020 is Friday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  January 8, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected February 14, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1696 2023-01-17 10:48:25

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/21 Saturday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Regular Movement of Mars is under way. RA 04h 22m 44.2s vs Yesterday's 23.3s

Today on Earth: 2023/01/17 Tuesday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 010.5 Sol Number: 021  Change in degrees is +.5 Julian date is: J0037021
Solar Longitude: 010.0 Sol Number: 020  Change in degrees is +.5 Julian date is: J0037020
Solar Longitude: 009.5 Sol Number: 019  Change in degrees is +.5 Julian date is: J0037019
===

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

===
Distance: Mars >> Sun per theskylive.com:   236,921,540 km [23.2 km/s] Difference is +170242 <= 7093 km/hour at 08.0 on 01/17 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   236,751,298 km [23.2 km/s] Difference is +171133 <= 7131 km/hour at 08.0 on 01/16 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   236,580,165 km [23.2 km/s] Difference is +171860 <= 7161 km/hour at 08.0 on 01/15 (time 8:00) <<== 24.0 hours
===

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular Movement as seen from Earth. [2023/01/08 entering steady state] [2023/01/14 clearly back in regular movement
TYC 1820-888-1 Mg 11.05 well ahead of Mars at RA 04h 24m 38.1s Day 1 ahead of 114 hour marker and just ahead of Mars heading left
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 13 above and ahead of 57 hour marker heading left
HIP 20491 Day 0 just below path and at far right of view - Day 9 past 72 hour marker Day 14 inside 57 hour marker heading left
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 14 ahead of Mars and outside 57 marker heading left
=== 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path no longer intersects the right border, and it has returned to regular movement to the left border

===
Earth Distance 2022/01/17 112,831,462 (increasing)
Earth Distance 2022/01/16 111,577,824 (increasing)
Earth Distance 2022/01/15 110,351,455 (increasing)
===

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 6 and 7 minutes. Communications delay would be 12+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===

Sol 021 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 021 is Saturday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  January 8, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected February 14, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Offline

#1697 2023-01-18 07:39:25

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/22 Sunday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Regular Movement of Mars is under way. RA 04h 22m 59.1 vs Yesterday's 44.2s

Today on Earth: 2023/01/18 Wednesday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 011.0 Sol Number: 022  Change in degrees is +.5 Julian date is: J0037022
Solar Longitude: 010.5 Sol Number: 021  Change in degrees is +.5 Julian date is: J0037021
Solar Longitude: 010.0 Sol Number: 020  Change in degrees is +.5 Julian date is: J0037020
===

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

===
Distance: Mars >> Sun per theskylive.com:   237,090,976 km [23.2 km/s] Difference is +169439 <= 7060 km/hour at 08.0 on 01/18 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   236,921,540 km [23.2 km/s] Difference is +170242 <= 7093 km/hour at 08.0 on 01/17 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   236,751,298 km [23.2 km/s] Difference is +171133 <= 7131 km/hour at 08.0 on 01/16 (time 8:00) <<== 24.0 hours
===

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular Movement as seen from Earth. [2023/01/08 entering steady state] [2023/01/14 clearly back in regular movement
TYC 1820-888-1 Mg 11.05 well ahead of Mars at RA 04h 24m 38.1s Day 2 ahead of and just below 91 hour marker
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 14 directly above Mars
HIP 20491 Day 0 just below path and at far right of view - Day 9 past 72 hour marker Day 15 inside 45.5 hour marker heading left
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 15 ahead of Mars and outside 45.5 marker heading left
=== 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path no longer intersects the right border, and it has returned to regular movement to the left border

===
Earth Distance 2022/01/18 113,870,243 (increasing)
Earth Distance 2022/01/17 112,831,462 (increasing)
Earth Distance 2022/01/16 111,577,824 (increasing)
===

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 6 and 7 minutes. Communications delay would be 12+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===

Sol 022 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 022 is Sunday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  January 8, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected February 14, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1698 2023-01-19 08:06:10

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/23 Monday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Regular Movement of Mars is under way. 04h 23m 19.8s vs Yesterday's RA 04h 22m 59.1

Today on Earth: 2023/01/19 Thursday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 011.4 Sol Number: 023  Change in degrees is +.4 Julian date is: J0037023
Solar Longitude: 011.0 Sol Number: 022  Change in degrees is +.5 Julian date is: J0037022
Solar Longitude: 010.5 Sol Number: 021  Change in degrees is +.5 Julian date is: J0037021
===

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

===
Distance: Mars >> Sun per theskylive.com:   237,259,871 km [23.2 km/s] Difference is +168895 <= 7037 km/hour at 08.0 on 01/19 (time 8:02:22) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   237,090,976 km [23.2 km/s] Difference is +169439 <= 7060 km/hour at 08.0 on 01/18 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   236,921,540 km [23.2 km/s] Difference is +170242 <= 7093 km/hour at 08.0 on 01/17 (time 8:00) <<== 24.0 hours
===

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular Movement as seen from Earth. [2023/01/08 entering steady state] [2023/01/14 clearly back in regular movement
TYC 1820-888-1 Mg 11.05 well ahead of Mars at RA 04h 24m 38.1s Day 3 below and just behind 78 hour marker
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 15 after and above Mars
HIP 20491 Day 0 just below path and at far right of view - Day 9 past 72 hour marker Day 16 right in front of Mars
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 16 ahead of Mars and inside 42.5 marker heading left
=== 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path no longer intersects the right border, and it has returned to regular movement to the left border

===
Earth Distance 2022/01/19 115,095,111 (increasing)
Earth Distance 2022/01/18 113,870,243 (increasing)
Earth Distance 2022/01/17 112,831,462 (increasing)
===

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 6 and 7 minutes. Communications delay would be 12+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===

Sol 023 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 023 is Monday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  January 8, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected February 14, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1699 2023-01-20 08:08:55

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/24 Tuesday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Regular Movement of Mars is under way. RA 04h 23m 42.9s vs Yesterday's RA 04h 23m 19.8s

Today on Earth: 2023/01/20 Friday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 011.9 Sol Number: 024  Change in degrees is +.5 Julian date is: J0037024
Solar Longitude: 011.4 Sol Number: 023  Change in degrees is +.4 Julian date is: J0037023
Solar Longitude: 011.0 Sol Number: 022  Change in degrees is +.5 Julian date is: J0037022
===

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

===
Distance: Mars >> Sun per theskylive.com:   237,427,436 km [23.1 km/s] Difference is +167565 <= 6982 km/hour at 08.0 on 01/20 (time 8:09) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   237,259,871 km [23.2 km/s] Difference is +168895 <= 7037 km/hour at 08.0 on 01/19 (time 8:02:22) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   237,090,976 km [23.2 km/s] Difference is +169439 <= 7060 km/hour at 08.0 on 01/18 (time 8:00) <<== 24.0 hours
===

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular Movement as seen from Earth. [2023/01/08 entering steady state] [2023/01/14 clearly back in regular movement
TYC 1820-888-1 Mg 11.05 well ahead of Mars at RA 04h 24m 38.1s Day 4 below and just before 33 hour marker
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 16 after and above 33 hour marker
HIP 20491 Day 0 just below path and at far right of view - Day 9 past 72 hour marker Day 17 past Mars
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 17 ahead of Mars and inside 33.0 marker heading left
=== 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path no longer intersects the right border, and it has returned to regular movement to the left border

===
Earth Distance 2022/01/20 116,310,383 (increasing)
Earth Distance 2022/01/19 115,095,111 (increasing)
Earth Distance 2022/01/18 113,870,243 (increasing)
===

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 6 and 7 minutes. Communications delay would be 12+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===

Sol 024 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 024 is Tuesday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  January 8, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected February 14, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

Month 1 of 24: First month of Quarter 1 and first month of Mars Year 37

Offline

#1700 2023-01-21 07:33:22

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 16,473

Re: Martian Calender - I have created a martian calender...

Today on Mars: 0037/01/25 Wednesday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Regular Movement of Mars is under way. RA 04h 24m 08.3s vs Yesterday's RA 04h 23m 42.9s

Today on Earth: 2023/01/21 Saturday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for oppositon/perigee/aphelion

Martian Year: 37  Martian Astronomical Month in 12 month format: 1 <<== The Astronomical month will increment when longitude reaches 30 degrees

Solar Longitude: 012.4 Sol Number: 025  Change in degrees is +.5 Julian date is: J0037025
Solar Longitude: 011.9 Sol Number: 024  Change in degrees is +.5 Julian date is: J0037024
Solar Longitude: 011.4 Sol Number: 023  Change in degrees is +.4 Julian date is: J0037023
===

Note that Solar Longitude measurement varies as a function of location in orbit.  Ls 0 is the moment when the Sun appears to transit from one hemisphere to the other.  Update from Mars.NASA.gov (The Sun crosses the equator of Mars (Vernal Equinox)). The transition itself is a function of the tilt of an object with respect to the Solar plane. Per squarewidget.com, Hipparchus created the celestial coordinate system we use today.

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars as seen from Earth
Todo: At next Aphelion/Perihelion record the Mars data J00##### (and set Search term)
Perihelion occurred at Ls 251 on Sol 485 - Earth Date 2022/06/21 Next: (estimated) 2024/05/08
Perihelion occurred at Ls 253 on Sol 485  Earth Date 2020/08/03  Earlier:  2018/09/16, 2016/10/29
Aphelion occurred at--- Ls 071 on Sol 152.  Aphelion Earth Dates: Earlier: 2017/10/07, 2015/11/20
Aphelion occurred near Ls 070 on Sol 153 (per www.planetary.org)

Note#3: The computations below are dependent upon both the computations provided by the reference web site and by accuracy of recording of the time of observations.  The calculations use tenths of hours.  The Sun Distance needs to be captured at the moment the time increments to a given tenth.

Note on data below: The figure quoted after distance is a rate of progress along the orbital path [exact meaning to be determined]
Minus prefix means Mars is approaching the Sun.  Plus prefix means Mars is moving away from the Sun.
The figure computed to the right of "Difference" is the rate of change of the distance to Sun. Increasing to Aphelion/Decreasing to Perihelion.

===
Distance: Mars >> Sun per theskylive.com:   237,594,361 km [23.1 km/s] Difference is +166925 <= 6955 km/hour at 08.0 on 01/21 (time 8:09) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   237,427,436 km [23.1 km/s] Difference is +167565 <= 6982 km/hour at 08.0 on 01/20 (time 8:09) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   237,259,871 km [23.2 km/s] Difference is +168895 <= 7037 km/hour at 08.0 on 01/19 (time 8:02:22) <<== 24.0 hours
===

Observation: The sky view is ** filled ** with objects and very few have been recorded and given identification by humans or their robot assistants
And! ** All ** the location assignments are from the perspective of Earth.  The entire catalog needs to be adjusted when inter-stellar travel begins
The work that lies ahead for the astronomical community is daunting - there is work ahead for centuries
2022/01/19 - All current (existing) stellar catalogs are computed with reference to the Earth.  Another civilization would use it's planet as reference.
Perhaps a Milky Way frame of reference will become necessary at some point. The Earth is as good a Zero point as any, for humans.

=== Mars is in Regular Movement as seen from Earth. [2023/01/08 entering steady state] [2023/01/14 clearly back in regular movement
Next up: TYC 1820-1131-1 Mg 11.02 RA 04h 24m 40.7s Ahead of Mars and way above path on Day 0
TYC 1820-888-1 Mg 11.05 well ahead of Mars at RA 04h 24m 38.1s Day 5 just  past Mars
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 17 after Mars and above 63 hour marker
HIP 20491 Day 0 just below path and at far right of view - Day 9 past 72 hour marker Day 18 past Mars and past 31.5 hour marker
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 18 behind Mars
=== 

Zoom Out Capability As a general observation ... I've become increasingly interested in knowing what the larger view of the sky might be like.
The site: theskylive.com does a terrific job of matching the view from Earth towards Mars, against a background of actual astronomical plates.
I wish there were a way (or rather, I wish I ** knew ** about a way that may exist) to enlarge the view until the entire galaxy is in view (Zoom out)
Update 2022/12/08 TheSkyLive.com provides a large view of selected objects: Select [Major Bodies] Then select [Information] in the body of interest
Update 2022/12/08 Scroll down to (body) Position and Finder Charts. Field of view is 50x30 degrees.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path no longer intersects the right border, and it has returned to regular movement to the left border

===
Earth Distance 2022/01/21 117,511,777 (increasing)
Earth Distance 2022/01/20 116,310,383 (increasing)
Earth Distance 2022/01/19 115,095,111 (increasing)
===

Mars and Earth are moving apart after Opposition.  The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144, 9:162, 10:180, 11:198,12:216, 13:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 6 and 7 minutes. Communications delay would be 12+ minutes round trip.

In his online interview with Dr. Zubrin at the 2020 Mars Conference, Elon Musk reminded the audience that communications with Mars will necessarily include an intermediary station to handle traffic when the Sun is between Mars and Earth.  Communications delays in that circumstance will increase due to the extra distance to be covered.  Mr. Musk indicated he expects such communication will be handled by laser.  Location would be optimum at poles of solar plane.

Regular movement of Mars as seen from Earth resumed as of 2023/01/13. RA is once again increasing.
According to www.hercampus.com, Retrograde movement began October 30, 2022.
The online solar system display at the link below shows clearly how the Mars movement will occur in months ahead.

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1. Viewed 2022/10/13: Opposition will occur some time in December of 2022.  Per earthsky.org, the date is December 8, 2022.

This web site offers an online orrery view of the Solar System: https://www.theplanetstoday.com/

===

Sol 025 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 025 is Wednesday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== The current year on Mars is 37
Per www.planetary.org Year 36 started 2021/02/07 on Earth. Mars Year 37 began 2022/12/27 on Earth.

The last Skip Day occurred  January 8, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected February 14, 2023 (range 15th >> 17th) on Earth.  The next re-alignment will occur near: June 23, 2023

For those who may not be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.
The next cycle began on the first Sol of the period of coincidence. The  alignment of weekdays interval is in the range: (310 - 337)
To find the first day of a period of coincidence: Set up: SearchTerm(colon) and (colon)Alignment and J0036*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)

For current weather on Mars see:

   ***https://mars.nasa.gov/insight/weather/***
   ***Insight's weather info has been suspended and now is directing to msl*** <<-- Insight's mission is over (2022)

https://mars.nasa.gov/msl/weather/

Per SpaceNut: Here is another web page by NASA containing the latest news releases

https://mars.nasa.gov/news/?page=0&per_ … ope=Latest

All forum members are invited to post significant events for this day.
Events of interest will be ON Mars, or relate to Mars. Examples are launches, landings, discoveries

Standard Month in Mars Business Calendar
Su    Mo    Tu    We    Th    Fr    Sa
1       2      3      4      5      6      7
8       9    10     11    12    13    14
15    16    17     18    19    20    21
22    23    24     25    26    27    28

Recruiting text may be found at the bottom of this post:  http://newmars.com/forums/viewtopic.php … 57#p154257

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