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#1651 2022-12-04 08:51:36

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/06 Friday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/04 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 348.5 Sol Number: 647  Change in degrees is +.6 Julian date is: J0036647
Solar Longitude: 347.9 Sol Number: 646  Change in degrees is +.5 Julian date is: J0036646
Solar Longitude: 347.4 Sol Number: 645  Change in degrees is +.5 Julian date is: J0036645
---

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.  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:   228,824,930 km [24.0 km/s] Difference is +194057 <= 8086 km/hour at 08.0 on 12/04 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   228,630,873 km [24.1 km/s] Difference is +194251 <= 8094 km/hour at 08.0 on 12/03 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   228,436,622 km [24.1 km/s] Difference is +194476 <= 8103 km/hour at 08.0 on 12/02 (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.
Next up: Galaxy at extreme right edge of view - below path - PGC 1720283 RA 05h 00m 48.5s Day 0 at far right
HIP 23550 Mg 7.37 RA 05h 03m 51.9s Just above path - Day 0 ahead of 16 hour marker Day 1 past Mars at 8 hour marker
---

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.
Update 2021/07/30 I wrote to an astronomer to ask if there might be a web site with a view showing the galaxy in context of a given view.
Update 2022/01/22 What I'm asking for is a "Zoom Out" feature.  If anyone knows of such a service, please contact the NewMars portal.

Note: The curve of the path of Mars as seen against the background of stars is now a line trending slightly up and back to the right
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/04 81,635,552 (increasing)
Earth Distance 2022/12/03 81,541,600 (increasing)
Earth Distance 2022/12/02 81,483,857 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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.
That would mean I've been incorrectly reporting the Eastward movement of Mars (with respect to Earth)
Mars has been moving Eastward as seen from Earth. Earth is passing "under" Mars. Movement 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.
Eastward movement started 2020/09/08 Sol 520 - Update 2022/11/01 Eastward movement ended and Westward movement has begun

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 647 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 647 is Friday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1652 2022-12-05 08:00:37

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/07 Saturday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/05 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 349.0 Sol Number: 648  Change in degrees is +.5 Julian date is: J0036648
Solar Longitude: 348.5 Sol Number: 647  Change in degrees is +.6 Julian date is: J0036647
Solar Longitude: 347.9 Sol Number: 646  Change in degrees is +.5 Julian date is: J0036646
---

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.  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:   229,019,506 km [24.0 km/s] Difference is +194576 <= 8074 km/hour at 08.1 on 12/04 (time 8:06) <<== 24.1 hours
Distance: Mars >> Sun per theskylive.com:   228,824,930 km [24.0 km/s] Difference is +194057 <= 8086 km/hour at 08.0 on 12/04 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   228,630,873 km [24.1 km/s] Difference is +194251 <= 8094 km/hour at 08.0 on 12/03 (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.
Next up: HIP 23259 Mg 7.98 RA 05h 00m 17.5s above path and outside 16 hour marker
PGC 1720283 RA 05h 00m 48.5s Day 0 at far right - Day 1 before 8 hour marker
---

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.
Update 2021/07/30 I wrote to an astronomer to ask if there might be a web site with a view showing the galaxy in context of a given view.
Update 2022/01/22 What I'm asking for is a "Zoom Out" feature.  If anyone knows of such a service, please contact the NewMars portal.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/05 81,750,596 (increasing)
Earth Distance 2022/12/04 81,635,552 (increasing)
Earth Distance 2022/12/03 81,541,600 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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.
That would mean I've been incorrectly reporting the Eastward movement of Mars (with respect to Earth)
Mars has been moving Eastward as seen from Earth. Earth is passing "under" Mars. Movement 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.
Eastward movement started 2020/09/08 Sol 520 - Update 2022/11/01 Eastward movement ended and Westward movement has begun

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 648 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 648 is Saturday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1653 2022-12-06 07:49:25

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/08 Sunday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/06 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 349.5 Sol Number: 649  Change in degrees is +.5 Julian date is: J0036649
Solar Longitude: 349.0 Sol Number: 648  Change in degrees is +.5 Julian date is: J0036648
Solar Longitude: 348.5 Sol Number: 647  Change in degrees is +.6 Julian date is: J0036647
---

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.  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:   229,212,242 km [24.0 km/s] Difference is +192736 <= 8064 km/hour at 08.0 on 12/06 (time 8:00) <<== 23.9 hours
Distance: Mars >> Sun per theskylive.com:   229,019,506 km [24.0 km/s] Difference is +194576 <= 8074 km/hour at 08.1 on 12/05 (time 8:06) <<== 24.1 hours
Distance: Mars >> Sun per theskylive.com:   228,824,930 km [24.0 km/s] Difference is +194057 <= 8086 km/hour at 08.0 on 12/04 (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.
Next up: HIP 23088 Mg 5.79 mini-Boomer RA 04h 58m 09.4s at far right and above path on Day 0
HIP 23259 Mg 7.98 RA 05h 00m 17.5s above path and outside 16 hour marker - just past Mars
PGC 1720283 RA 05h 00m 48.5s Day 0 at far right - Day 1 before 8 hour marker - Day 2 past 8 hour marker past Mars
---

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.
Update 2021/07/30 I wrote to an astronomer to ask if there might be a web site with a view showing the galaxy in context of a given view.
Update 2022/01/22 What I'm asking for is a "Zoom Out" feature.  If anyone knows of such a service, please contact the NewMars portal.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/06 81,898,767 (increasing)
Earth Distance 2022/12/05 81,750,596 (increasing)
Earth Distance 2022/12/04 81,635,552 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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.
That would mean I've been incorrectly reporting the Eastward movement of Mars (with respect to Earth)
Mars had been moving Eastward as seen from Earth. Earth is passing "under" Mars. Movement 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.
Eastward movement started 2020/09/08 Sol 520 - Update 2022/11/01 Eastward movement ended and Westward movement has begun

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 649 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 649 is Saturday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1654 2022-12-07 07:47:33

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/09 Monday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/07 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 350.0 Sol Number: 650  Change in degrees is +.5 Julian date is: J0036650
Solar Longitude: 349.5 Sol Number: 649  Change in degrees is +.5 Julian date is: J0036649
Solar Longitude: 349.0 Sol Number: 648  Change in degrees is +.5 Julian date is: J0036648
---

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.  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:   229,405,494 km [24.0 km/s] Difference is +193252 <= 8052 km/hour at 08.0 on 12/07 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   229,212,242 km [24.0 km/s] Difference is +192736 <= 8064 km/hour at 08.0 on 12/06 (time 8:00) <<== 23.9 hours
Distance: Mars >> Sun per theskylive.com:   229,019,506 km [24.0 km/s] Difference is +194576 <= 8074 km/hour at 08.1 on 12/05 (time 8:06) <<== 24.1 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 23032 Mg 9.62 RA 04h 57m 09.3s in path Day 0 - at 16 hour marker
HIP 23088 Mg 5.79 mini-Boomer RA 04h 58m 09.4s at far right and above path on Day 0 - Day 1 just above Mars
HIP 23259 Mg 7.98 RA 05h 00m 17.5s above path and outside 16 hour marker - just past Mars - still visible at top left
PGC 1720283 RA 05h 00m 48.5s Day 0 at far right - Day 1 before 8 hour marker - Day 2 past 8 hour marker past Mars - Day 3 still visible at far left
---

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.
Update 2021/07/30 I wrote to an astronomer to ask if there might be a web site with a view showing the galaxy in context of a given view.
Update 2022/01/22 What I'm asking for is a "Zoom Out" feature.  If anyone knows of such a service, please contact the NewMars portal.

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the right
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/07 82,077,477 (increasing)
Earth Distance 2022/12/06 81,898,767 (increasing)
Earth Distance 2022/12/05 81,750,596 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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.
That would mean I've been incorrectly reporting the Eastward movement of Mars (with respect to Earth)
Mars had been moving Eastward as seen from Earth. Earth is passing "under" Mars. Movement 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.
Eastward movement started 2020/09/08 Sol 520 - Update 2022/11/01 Eastward movement ended and Westward movement has begun

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 650 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 650 is Monday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1655 2022-12-08 09:03:22

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/10 Tuesday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

One day note: The Moon of Earth occluded Mars (as seen from Earth) during the past day.

Today on Earth: 2022/12/08 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 350.5 Sol Number: 651  Change in degrees is +.5 Julian date is: J0036651
Solar Longitude: 350.0 Sol Number: 650  Change in degrees is +.5 Julian date is: J0036650
Solar Longitude: 349.5 Sol Number: 649  Change in degrees is +.5 Julian date is: J0036649
---

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.  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:   229,598,468 km [24.0 km/s] Difference is +192974 <= 8041 km/hour at 08.0 on 12/08 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   229,405,494 km [24.0 km/s] Difference is +193252 <= 8052 km/hour at 08.0 on 12/07 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   229,212,242 km [24.0 km/s] Difference is +192736 <= 8064 km/hour at 08.0 on 12/06 (time 8:00) <<== 23.9 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 1726288 RA 04h 53m 56.1s Day 0 above path and at far right edge of view
HIP 23032 Mg 9.62 RA 04h 57m 09.3s in path Day 0 - at 16 hour marker - Day 1 past 8 hour marker
HIP 23088 Mg 5.79 mini-Boomer RA 04h 58m 09.4s at far right and above path on Day 0 - Day 1 just above Mars - Day 2 still visible on left edge
--- 

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.
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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/08 82,298,888 (increasing)
Earth Distance 2022/12/07 82,077,477 (increasing)
Earth Distance 2022/12/06 81,898,767 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 651 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 651 is Tuesday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1656 2022-12-09 07:34:18

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/11 Wednesday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/09 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 351.0 Sol Number: 652  Change in degrees is +.5 Julian date is: J0036652
Solar Longitude: 350.5 Sol Number: 651  Change in degrees is +.5 Julian date is: J0036651
Solar Longitude: 350.0 Sol Number: 650  Change in degrees is +.5 Julian date is: J0036650
---

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.  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:   229,791,145 km [23,9 km/s] Difference is +192677 <= 8027 km/hour at 08.0 on 12/09 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   229,598,468 km [24.0 km/s] Difference is +192974 <= 8041 km/hour at 08.0 on 12/08 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   229,405,494 km [24.0 km/s] Difference is +193252 <= 8052 km/hour at 08.0 on 12/07 (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 22725 Mg 8.56 RA 04h 53m 18.4s Below path Day 0 ahead of 17 hour marker
Galaxy PGC 1726288 RA 04h 53m 56.1s Day 0 above path and at far right edge of view - Day 1 - ahead of 8.5 hour marker
--- 

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.
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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/09 82,523,741 (increasing)
Earth Distance 2022/12/08 82,298,888 (increasing)
Earth Distance 2022/12/07 82,077,477 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 652 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 652 is Wednesday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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

#1657 2022-12-10 07:52:11

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/12 Thursday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/10 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 351.6 Sol Number: 653  Change in degrees is +.6 Julian date is: J0036653
Solar Longitude: 351.0 Sol Number: 652  Change in degrees is +.5 Julian date is: J0036652
Solar Longitude: 350.5 Sol Number: 651  Change in degrees is +.5 Julian date is: J0036651
---

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:   229,983,528 km [23,9 km/s] Difference is +192383 <= 8015 km/hour at 08.0 on 12/10 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   229,791,145 km [23,9 km/s] Difference is +192677 <= 8027 km/hour at 08.0 on 12/09 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   229,598,468 km [24.0 km/s] Difference is +192974 <= 8041 km/hour at 08.0 on 12/08 (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.
Next up: Galaxy below path and at far right of view on Day 0 : PGC 1716908 RA 04h 51m 08.4s
HIP 22725 Mg 8.56 RA 04h 53m 18.4s Below path Day 0 ahead of 17 hour marker - Day 1 below Mars
Galaxy PGC 1726288 RA 04h 53m 56.1s Day 0 above path and at far right edge of view - Day 1 - ahead of 8.5 hour marker - Day 2 above 8.5 past Mars
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/08 82,796,444 (increasing)
Earth Distance 2022/12/09 82,523,741 (increasing)
Earth Distance 2022/12/08 82,298,888 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 653 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 653 is Thursday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1658 2022-12-11 08:09:07

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/13 Friday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/11 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 352.1 Sol Number: 654  Change in degrees is +.5 Julian date is: J0036654
Solar Longitude: 351.6 Sol Number: 653  Change in degrees is +.6 Julian date is: J0036653
Solar Longitude: 351.0 Sol Number: 652  Change in degrees is +.5 Julian date is: J0036652
---

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:   230,175,535 km [23,9 km/s] Difference is +192007 <= 8000 km/hour at 08.0 on 12/11 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   229,983,528 km [23,9 km/s] Difference is +192383 <= 8015 km/hour at 08.0 on 12/10 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   229,791,145 km [23,9 km/s] Difference is +192677 <= 8027 km/hour at 08.0 on 12/09 (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.
Next up: Star below path and just showing up at right border: TYC 1835-734-1 Mg 11.19 RA 04h 49m 50.1s
Galaxy below path and at far right of view on Day 0 : PGC 1716908 RA 04h 51m 08.4s  - Day 1 below and just ahead of Mars ...
HIP 22725 Mg 8.56 RA 04h 53m 18.4s Below path Day 0 ahead of 17 hour marker - Day 1 below Mars - Day 2 near left border
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/11 83,100,592 (increasing)
Earth Distance 2022/12/10 82,796,444 (increasing)
Earth Distance 2022/12/09 82,523,741 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 654 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 654 is Friday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1659 2022-12-12 07:39:38

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/14 Saturday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/12 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 352.6 Sol Number: 655  Change in degrees is +.5 Julian date is: J0036655
Solar Longitude: 352.1 Sol Number: 654  Change in degrees is +.5 Julian date is: J0036654
Solar Longitude: 351.6 Sol Number: 653  Change in degrees is +.6 Julian date is: J0036653
---

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:   230,367,241 km [23,9 km/s] Difference is +191706 <= 7988 km/hour at 08.0 on 12/12 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   230,175,535 km [23,9 km/s] Difference is +192007 <= 8000 km/hour at 08.0 on 12/11 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   229,983,528 km [23,9 km/s] Difference is +192383 <= 8015 km/hour at 08.0 on 12/10 (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 has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
Next up: a pair of micro-Boomers are on the scene: HIP 22394 Mg 9.37 RA 04h 49m 12.9s Day 0 below 8.5 marker and HIP 22334 Mg 8.22 past 17 hours
Next up: a pair of micro-Boomers are on the scene: HIP 22394 Mg 9.37 RA 04h 49m 12.9s Day 0 below 8.5 marker and HIP 22334 Mg 8.22 past 17 hours
TYC 1835-734-1 Mg 11.19 RA 04h 49m 50.1s  - Day 1 below Mars
Galaxy below path and at far right of view on Day 0 : PGC 1716908 RA 04h 51m 08.4s  - Day 1 below and just ahead of Mars ... Day 2 below 17 hour marker
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/12 83,423,333 (increasing)
Earth Distance 2022/12/11 83,100,592 (increasing)
Earth Distance 2022/12/10 82,796,444 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 655 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 655 is Saturday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1660 2022-12-12 07:43:46

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/14 Saturday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/12 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 352.6 Sol Number: 655  Change in degrees is +.5 Julian date is: J0036655
Solar Longitude: 352.1 Sol Number: 654  Change in degrees is +.5 Julian date is: J0036654
Solar Longitude: 351.6 Sol Number: 653  Change in degrees is +.6 Julian date is: J0036653
---

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:   230,367,241 km [23,9 km/s] Difference is +191706 <= 7988 km/hour at 08.0 on 12/12 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   230,175,535 km [23,9 km/s] Difference is +192007 <= 8000 km/hour at 08.0 on 12/11 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   229,983,528 km [23,9 km/s] Difference is +192383 <= 8015 km/hour at 08.0 on 12/10 (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 has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
Next up: a pair of micro-Boomers are on the scene: HIP 22394 Mg 9.37 RA 04h 49m 12.9s Day 0 below 8.5 marker and HIP 22334 Mg 8.22 past 17 hours
Next up: a pair of micro-Boomers are on the scene: HIP 22394 Mg 9.37 RA 04h 49m 12.9s Day 0 below 8.5 marker and HIP 22334 Mg 8.22 past 17 hours
TYC 1835-734-1 Mg 11.19 RA 04h 49m 50.1s  - Day 1 below Mars
Galaxy below path and at far right of view on Day 0 : PGC 1716908 RA 04h 51m 08.4s  - Day 1 below and just ahead of Mars ... Day 2 below 17 hour marker
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/12 83,423,333 (increasing)
Earth Distance 2022/12/11 83,100,592 (increasing)
Earth Distance 2022/12/10 82,796,444 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 655 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 655 is Saturday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1661 2022-12-13 07:32:32

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/15 Sunday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/13 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 353.1 Sol Number: 656  Change in degrees is +.5 Julian date is: J0036656
Solar Longitude: 352.6 Sol Number: 655  Change in degrees is +.5 Julian date is: J0036655
Solar Longitude: 352.1 Sol Number: 654  Change in degrees is +.5 Julian date is: J0036654
---

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:   230,558,599 km [23,9 km/s] Difference is +191358 <= 7973 km/hour at 08.0 on 12/13 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   230,367,241 km [23,9 km/s] Difference is +191706 <= 7988 km/hour at 08.0 on 12/12 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   230,175,535 km [23,9 km/s] Difference is +192007 <= 8000 km/hour at 08.0 on 12/11 (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 has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
HIP 22334 Mg 8.22 past 17 hours Day 1 just past Mars
HIP 22394 Mg 9.37 RA 04h 49m 12.9s Day 0 below 8.5 marker Day 1 past 9 hour marker
TYC 1835-734-1 Mg 11.19 RA 04h 49m 50.1s  - Day 1 below Mars - Day 2 past 18 hour marker
Galaxy below path Day 0 : PGC 1716908 RA 04h 51m 08.4s  - Day 1 below and just ahead of Mars ... Day 2 below 17 hour marker - Day 3 still visible at far left
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/13 83,783,862 (increasing)
Earth Distance 2022/12/12 83,423,333 (increasing)
Earth Distance 2022/12/11 83,100,592 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 656 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 656 is Sunday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1662 2022-12-14 07:34:55

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/16 Monday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/14 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 353.6 Sol Number: 657  Change in degrees is +.5 Julian date is: J0036657
Solar Longitude: 353.1 Sol Number: 656  Change in degrees is +.5 Julian date is: J0036656
Solar Longitude: 352.6 Sol Number: 655  Change in degrees is +.5 Julian date is: J0036655
---

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:   230,749,541 km [23,8 km/s] Difference is +190942 <= 7956 km/hour at 08.0 on 12/14 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   230,558,599 km [23,9 km/s] Difference is +191358 <= 7973 km/hour at 08.0 on 12/13 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   230,367,241 km [23,9 km/s] Difference is +191706 <= 7988 km/hour at 08.0 on 12/12 (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 has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
Next up: There are no labeled objects in the right side of today's view provided by TheSkyLive.com.
Next up: Galaxy at top of view and over 9 hour marker on Day 0 - PGC 1726879 RA 04h 45m 56.9s
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/14 84,174,316 (increasing)
Earth Distance 2022/12/13 83,783,862 (increasing)
Earth Distance 2022/12/12 83,423,333 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 657 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 657 is Monday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1663 2022-12-15 07:54:33

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/17 Tuesday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/15 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 354.1 Sol Number: 658  Change in degrees is +.5 Julian date is: J0036658
Solar Longitude: 353.6 Sol Number: 657  Change in degrees is +.5 Julian date is: J0036657
Solar Longitude: 353.1 Sol Number: 656  Change in degrees is +.5 Julian date is: J0036656
---

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:   230,940,068 km [23,8 km/s] Difference is +190525 <= 7939 km/hour at 08.0 on 12/15 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   230,749,541 km [23,8 km/s] Difference is +190942 <= 7956 km/hour at 08.0 on 12/14 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   230,558,599 km [23,9 km/s] Difference is +191358 <= 7973 km/hour at 08.0 on 12/13 (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 has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
Next up: Also below path at far right: TYC 1834-337-1 RA 04h 42m 41.2s Day 0 at far right of view
Next up: There are a couple of stars at the far right: TYC 1834-591-1 Mg 11.05 RA 04h 43m 45.3s below 18 hour marker on Day 0
Galaxy at top of view and over 9 hour marker on Day 0 - PGC 1726879 RA 04h 45m 56.9s - Day 1 still visible at far left of view
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/15 84,599,980 (increasing)
Earth Distance 2022/12/14 84,174,316 (increasing)
Earth Distance 2022/12/13 83,783,862 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 658 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 658 is Tuesday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1664 2022-12-16 07:39:20

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/18 Wednesday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/16 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 354.6 Sol Number: 659  Change in degrees is +.5 Julian date is: J0036659
Solar Longitude: 354.1 Sol Number: 658  Change in degrees is +.5 Julian date is: J0036658
Solar Longitude: 353.6 Sol Number: 657  Change in degrees is +.5 Julian date is: J0036657
---

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:   231,130,201 km [23,8 km/s] Difference is +190133 <= 7922 km/hour at 08.0 on 12/16 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   230,940,068 km [23,8 km/s] Difference is +190525 <= 7939 km/hour at 08.0 on 12/15 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   230,749,541 km [23,8 km/s] Difference is +190942 <= 7956 km/hour at 08.0 on 12/14 (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 has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
Next up: Galaxy PGC 1714414 RA 04h 41m 51.3s below path - Day 0 below and ahead of 19 hour marker
TYC 1834-337-1 RA 04h 42m 41.2s Day 0 at far right of view - Day 1 under 19 hour marker
TYC 1834-591-1 Mg 11.05 RA 04h 43m 45.3s below 18 hour marker on Day 0 - Day 1 Directly beneath Mars
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/16 85,044,493 (increasing)
Earth Distance 2022/12/15 84,599,980 (increasing)
Earth Distance 2022/12/14 84,174,316 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 659 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 659 is Wednesday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1665 2022-12-17 07:43:56

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/19 Thursday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/17 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 355.1 Sol Number: 660  Change in degrees is +.5 Julian date is: J0036660
Solar Longitude: 354.6 Sol Number: 659  Change in degrees is +.5 Julian date is: J0036659
Solar Longitude: 354.1 Sol Number: 658  Change in degrees is +.5 Julian date is: J0036658
---

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:   231,319,983 km [23,8 km/s] Difference is +189782 <= 7907 km/hour at 08.0 on 12/17 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   231,130,201 km [23,8 km/s] Difference is +190133 <= 7922 km/hour at 08.0 on 12/16 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   230,940,068 km [23,8 km/s] Difference is +190525 <= 7939 km/hour at 08.0 on 12/15 (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 has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
Next up: Galaxy 3097126 RA 04h 39m 58.3s above path Day 0 just coming into view on far right
PGC 1714414 RA 04h 41m 51.3s below path - Day 0 below and ahead of 19 hour marker - Day 1 below and just ahead of Mars
TYC 1834-337-1 RA 04h 42m 41.2s Day 0 at far right of view - Day 1 under 19 hour marker - Day 2 below 9.5 marker - likely last day for 337
TYC 1834-591-1 Mg 11.05 RA 04h 43m 45.3s below 18 hour marker on Day 0 - Day 1 Directly beneath Mars - Day 2 past 19 hour marker - last day for 591
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/17 85,525,218 (increasing)
Earth Distance 2022/12/16 85,044,493 (increasing)
Earth Distance 2022/12/15 84,599,980 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 660 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 660 is Thursday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1666 2022-12-18 08:09:10

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/20 Friday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/18 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 355.6 Sol Number: 661  Change in degrees is +.5 Julian date is: J0036661
Solar Longitude: 355.1 Sol Number: 660  Change in degrees is +.5 Julian date is: J0036660
Solar Longitude: 354.6 Sol Number: 659  Change in degrees is +.5 Julian date is: J0036659
+---

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:   231,510,830 km [23,8 km/s] Difference is +190847 <= 7886 km/hour at 08.2 on 12/18 (time 8:12) <<== 24.2 hours
Distance: Mars >> Sun per theskylive.com:   231,319,983 km [23,8 km/s] Difference is +189782 <= 7907 km/hour at 08.0 on 12/17 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   231,130,201 km [23,8 km/s] Difference is +190133 <= 7922 km/hour at 08.0 on 12/16 (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 has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
Next up: TYC 1834-401-1 Mg 9.02 RA 04h 38m 55.9s below path Day 0 at far right of view
also note: HIP 21759 RA 04h 40m 21.0s Day 0 above Mars
PGC  3097126 RA 04h 39m 58.3s above path Day 0 just coming into view on far right - Day 1 above 10 hour marker
PGC 1714414 RA 04h 41m 51.3s below path - Day 0 below and ahead of 19 hour marker - Day 1 below and just ahead of Mars - Day 2 below 20 hour marker
TYC 1834-337-1 RA 04h 42m 41.2s Day 0 at far right of view - Day 1 under 19 hour marker - Day 3 at far left of view -  last day for 337
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/18 86,043,495 (increasing)
Earth Distance 2022/12/17 85,525,218 (increasing)
Earth Distance 2022/12/16 85,044,493 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 661 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 661 is Friday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1667 2022-12-19 07:55:33

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/21 Saturday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/19 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 356.1 Sol Number: 662  Change in degrees is +.5 Julian date is: J0036662
Solar Longitude: 355.6 Sol Number: 661  Change in degrees is +.5 Julian date is: J0036661
Solar Longitude: 355.1 Sol Number: 660  Change in degrees is +.5 Julian date is: J0036660
+---

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:   231,698,952 km [23,7 km/s] Difference is +188122 <= 7871 km/hour at 08.1 on 12/19 (time 8:06) <<== 23.9 hours
Distance: Mars >> Sun per theskylive.com:   231,510,830 km [23,8 km/s] Difference is +190847 <= 7886 km/hour at 08.2 on 12/18 (time 8:12) <<== 24.2 hours
Distance: Mars >> Sun per theskylive.com:   231,319,983 km [23,8 km/s] Difference is +189782 <= 7907 km/hour at 08.0 on 12/17 (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 has begun Retrograde Movement as seen from Earth. On 2022/10/30 the reverse began.
Next up: Galaxy PGC 3097125 RA 04h 37m 29.4s in path Day 0 at far right of view
TYC 1834-401-1 Mg 9.02 RA 04h 38m 55.9s below path Day 0 at far right of view - Day 1 just below and ahead of mars
HIP 21759 RA 04h 40m 21.0s Day 0 above Mars -  Day 1 above 20 hours past marker
PGC  3097126 RA 04h 39m 58.3s above path Day 0 just coming into view on far right - Day 1 above 10 hour marker  - Day 2 above 10 hours past marker
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/19 86,576,148 (increasing)
Earth Distance 2022/12/18 86,043,495 (increasing)
Earth Distance 2022/12/17 85,525,218 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 662 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 662 is Saturday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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

#1668 2022-12-20 07:34:35

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/22 Sunday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/20 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 356.6 Sol Number: 663  Change in degrees is +.5 Julian date is: J0036663
Solar Longitude: 356.1 Sol Number: 662  Change in degrees is +.5 Julian date is: J0036662
Solar Longitude: 355.6 Sol Number: 661  Change in degrees is +.5 Julian date is: J0036661
+---

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:   231,886,568 km [23,7 km/s] Difference is +187616 <= 7850 km/hour at 08.0 on 12/20 (time 8:00) <<== 23.9 hours
Distance: Mars >> Sun per theskylive.com:   231,698,952 km [23,7 km/s] Difference is +188122 <= 7871 km/hour at 08.1 on 12/19 (time 8:06) <<== 23.9 hours
Distance: Mars >> Sun per theskylive.com:   231,510,830 km [23,8 km/s] Difference is +190847 <= 7886 km/hour at 08.2 on 12/18 (time 8:12) <<== 24.2 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 86267 RA 04h 36m 20.4s above path Day 0 ahead of 21 hour marker
PGC 3097125 RA 04h 37m 29.4s in path Day 0 at far right of view - Day 1 just above 10.5 hour marker
TYC 1834-401-1 Mg 9.02 RA 04h 38m 55.9s below path Day 0 at far right of view - Day 1 just below and ahead of mars - Day 2 beyond 10.5 hour marker
PGC  3097126 RA 04h 39m 58.3s above path Day 0 just coming into view on far right - Day 1 above 10 hour marker  - Day 3 at far left border - last day
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/20 87,132,705 (increasing)
Earth Distance 2022/12/19 86,576,148 (increasing)
Earth Distance 2022/12/18 86,043,495 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 663 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 663 is Sunday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1669 2022-12-21 07:20:16

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/23 Monday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/21 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 357.2 Sol Number: 664  Change in degrees is +.6 Julian date is: J0036664
Solar Longitude: 356.6 Sol Number: 663  Change in degrees is +.5 Julian date is: J0036663
Solar Longitude: 356.1 Sol Number: 662  Change in degrees is +.5 Julian date is: J0036662
---

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:   232,074,448 km [23,7 km/s] Difference is +187880 <= 7828 km/hour at 08.0 on 12/21 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   231,886,568 km [23,7 km/s] Difference is +187616 <= 7850 km/hour at 08.0 on 12/20 (time 8:00) <<== 23.9 hours
Distance: Mars >> Sun per theskylive.com:   231,698,952 km [23,7 km/s] Difference is +188122 <= 7871 km/hour at 08.1 on 12/19 (time 8:06) <<== 23.9 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 1833-978-1 Mg 11.05 RA 04h 34m 46.4s Day 0 at far right of view
Galaxy PGC 86267 RA 04h 36m 20.4s above path Day 0 ahead of 21 hour marker - Day 1 just ahead of Mars
PGC 3097125 RA 04h 37m 29.4s in path Day 0 at far right of view - Day 1 just above 10.5 hour marker - Day 2 above 11 hours past marker
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/20 87,721,573 (increasing)
Earth Distance 2022/12/20 87,132,705 (increasing)
Earth Distance 2022/12/19 86,576,148 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 664 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 664 is Monday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1670 2022-12-22 07:37:04

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/24 Tuesday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/22 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 357.7 Sol Number: 665  Change in degrees is +.5 Julian date is: J0036665
Solar Longitude: 357.2 Sol Number: 664  Change in degrees is +.6 Julian date is: J0036664
Solar Longitude: 356.6 Sol Number: 663  Change in degrees is +.5 Julian date is: J0036663
---

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:   232,261,873 km [23,7 km/s] Difference is +187425 <= 7809 km/hour at 08.0 on 12/22 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   232,074,448 km [23,7 km/s] Difference is +187880 <= 7828 km/hour at 08.0 on 12/21 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   231,886,568 km [23,7 km/s] Difference is +187616 <= 7850 km/hour at 08.0 on 12/20 (time 8:00) <<== 23.9 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 1833-867-1 Mg 11.01 RA 04h 33m 43.2s above path Day 0 - ahead of 23 hour marker
TYC 1833-978-1 Mg 11.05 RA 04h 34m 46.4s Day 0 at far right of view - Day 1 above 11.5  hour marker
Galaxy PGC 86267 RA 04h 36m 20.4s above path Day 0 ahead of 21 hour marker - Day 1 just ahead of Mars - Day 2 past 11.5 hour marker
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/22 88,350,736 (increasing)
Earth Distance 2022/12/21 87,721,573 (increasing)
Earth Distance 2022/12/20 87,132,705 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 665 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 665 is Tuesday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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***

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1671 2022-12-23 09:50:38

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/25 Wednesday <<-- Days of the week offset 2 with Earth.  (count from Mars to Earth (updated 2022/11/17))

Today on Earth: 2022/12/23 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 358.2 Sol Number: 666  Change in degrees is +.5 Julian date is: J0036666
Solar Longitude: 357.7 Sol Number: 665  Change in degrees is +.5 Julian date is: J0036665
Solar Longitude: 357.2 Sol Number: 664  Change in degrees is +.6 Julian date is: J0036664
---

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:   232,261,873 km [23,7 km/s] Difference is +186943 <= 7789 km/hour at 08.0 on 12/23 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   232,261,873 km [23,7 km/s] Difference is +187425 <= 7809 km/hour at 08.0 on 12/22 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   232,074,448 km [23,7 km/s] Difference is +187880 <= 7828 km/hour at 08.0 on 12/21 (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 1833-138-1 Mg 11.02 RA 04h 32m 05.2s well above path Day 0 at far right
TYC 1833-867-1 Mg 11.01 RA 04h 33m 43.2s above path Day 0 - ahead of 23 hour marker - Day 1 just ahead of Mars
TYC 1833-978-1 Mg 11.05 RA 04h 34m 46.4s Day 0 at far right of view - Day 1 above 11.5  hour marker - Day 2 past Mars at 11.5 marker
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/23 89,059,333 (increasing)
Earth Distance 2022/12/21 88,350,736 (increasing)
Earth Distance 2022/12/20 87,721,573 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 666 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 666 is Wednesday  in the Proposed Business calendar for Mars.  Sol 630 was a skip day on Earth. 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

The last Skip Day occurred  November 17,  2022 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected December 24, 2022 (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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1672 2022-12-24 07:55:37

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/25 Wednesday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One day note: Today is a Skip Day on Mars - The next Skip Day is expected at the end of January, 2023, on Earth.

Today on Earth: 2022/12/24 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 358.7 Sol Number: 666  Change in degrees is +.5 Julian date is: J0036666 << Skip Day on Mars
Solar Longitude: 358.2 Sol Number: 666  Change in degrees is +.5 Julian date is: J0036666
Solar Longitude: 357.7 Sol Number: 665  Change in degrees is +.5 Julian date is: J0036665
---

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:   232,635,255 km [23,6 km/s] Difference is +186439 <= 7768 km/hour at 08.0 on 12/24 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   232,261,873 km [23,7 km/s] Difference is +186943 <= 7789 km/hour at 08.0 on 12/23 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   232,261,873 km [23,7 km/s] Difference is +187425 <= 7809 km/hour at 08.0 on 12/22 (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 1833-138-1 Mg 11.02 RA 04h 32m 05.2s well above path Day 0 at far right - Day 1 above 12.5 marker
TYC 1833-867-1 Mg 11.01 RA 04h 33m 43.2s above path Day 0 - ahead of 23 hour marker - Day 1 just ahead of Mars - Day 2 past 12.5 hour marker
TYC 1833-978-1 Mg 11.05 RA 04h 34m 46.4s Day 0 at far right of view - Day 1 above 11.5  hour marker - Day 3 past Mars past 25 hour marker
--- 

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
As of 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/24 89,683,749 (increasing)
Earth Distance 2022/12/23 89,059,333 (increasing)
Earth Distance 2022/12/21 88,350,736 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 4 and 5 minutes. Communications delay would be 8+ 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 666 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 666 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1673 2022-12-25 08:19:07

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/26 Thursday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: Tomorrow's report will show Saturday instead of Friday.  The Business Calendar for Mars skips the last Friday of each quarter.
In addition, the Saturday report will show New Year's Eve on Mars, which will be extended in length to match the astronomical year.
At the stroke of midnight on New Years Eve on Mars, the Business Calendar clock will align with the Astronomical Calendar.
We are leaving Year 36 and will embark upon Year 37.  Best wishes to all the rovers and satellites at Mars, and best wishes for success to all the teams on Earth who will be launching rovers and satellites during Year 37.  It is entirely possible the first precursor of a human expedition will land on Mars in Year 37.

Today on Earth: 2022/12/25 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 359.2 Sol Number: 667  Change in degrees is +.5 Julian date is: J0036667
Solar Longitude: 358.7 Sol Number: 666  Change in degrees is +.5 Julian date is: J0036666 << Skip Day on Mars
Solar Longitude: 358.2 Sol Number: 666  Change in degrees is +.5 Julian date is: J0036666
---

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:   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
Distance: Mars >> Sun per theskylive.com:   232,635,255 km [23,6 km/s] Difference is +186439 <= 7768 km/hour at 08.0 on 12/24 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   232,261,873 km [23,7 km/s] Difference is +186943 <= 7789 km/hour at 08.0 on 12/23 (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: No labeled objects are available - There is a curious little asterism in the path at RA 04h 30m 09.0s trapazoid with wingmen
TYC 1833-138-1 Mg 11.02 RA 04h 32m 05.2s well above path Day 0 at far right - Day 1 above 12.5 marker - Day 2 just past Mars
TYC 1833-867-1 Mg 11.01 RA 04h 33m 43.2s above path Day 0 - ahead of 23 hour marker - Day 1 just ahead of Mars - Day 3 past 26 hour marker
--- 

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 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/25 90,397,928 (increasing)
Earth Distance 2022/12/24 89,683,749 (increasing)
Earth Distance 2022/12/23 89,059,333 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 667 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary. <<== Skip Day Sol 593
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 667 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1674 2022-12-26 07:41:04

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

Today on Mars: 0036/24/28 Saturday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: Today is New Year's Eve on Mars. 
The length of the day will be extended to bring the Business Calender into alignment with the Astronomical Calendar
The Astronomical Year will advance from 36 to 37 overnight.

Today on Earth: 2022/12/26 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: 36  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 359.7 Sol Number: 668  Change in degrees is +.5 Julian date is: J0036668 << New Year's Eve on Mars
Solar Longitude: 359.2 Sol Number: 667  Change in degrees is +.5 Julian date is: J0036667
Solar Longitude: 358.7 Sol Number: 666  Change in degrees is +.5 Julian date is: J0036666 << Skip 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:   233,006,604 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
Distance: Mars >> Sun per theskylive.com:   232,635,255 km [23,6 km/s] Difference is +186439 <= 7768 km/hour at 08.0 on 12/24 (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: No labeled objects. Pair of stars form gate across path at RA 04h 28m 50.5 s Day 0 at right border
Trapazoid asterism in the path at RA 04h 30m 09.0s trapazoid with wingmen - Day 1 at 14 hour marker
TYC 1833-138-1 Mg 11.02 RA 04h 32m 05.2s well above path Day 0 at far right - Day 1 above 12.5 marker - Day 3 above 28 hour marker (last day)
--- 

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 2022/11/02, the curve of the path no longer insects the left border of the view, but instead intersects the right border.

---
Earth Distance 2022/12/26 91,110,233 (increasing)
Earth Distance 2022/12/25 90,397,928 (increasing)
Earth Distance 2022/12/24 89,683,749 (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 will be in Opposition (Earth center)  in December of 2022.  The date will coincide 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 668 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 24
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 668 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 36
Per www.planetary.org this occurred February 7, 2021 (on Earth). The new Mars Year was 36.

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 24 of 24: Last month of Quarter 4 and Last month of Mars year

Offline

#1675 2022-12-26 23:19:00

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 12,677

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

It is New Year's Day on Mars.

Both the Astronomical calendar, and the proposed Business Calendar for Mars are in alignment:

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html

Martian Year:         37            Astronomical Martian Month:    1
Solar longitude Ls:    0.2     Sol number:    1

NewMars.com has completed two full Mars Years in tracking the movement of Mars in it's orbit.

(th)

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