New Mars Forums

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/01/26 Thursday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Regular Movement of Mars is under way. RA 04h 24m 48.6s vs Yesterday's RA 04h 24m 08.3s

Today on Earth: 2023/01/22 Sunday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

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

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

Solar Longitude: 012.9 Sol Number: 026  Change in degrees is +.5 Julian date is: J0037026
Solar Longitude: 012.4 Sol Number: 025  Change in degrees is +.5 Julian date is: J0037025
Solar Longitude: 011.9 Sol Number: 024  Change in degrees is +.5 Julian date is: J0037024
===

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

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

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

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

===
Distance: Mars >> Sun per theskylive.com:   237,760,410 km [23.1 km/s] Difference is +166049 <= 6919 km/hour at 08.0 on 01/22 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   237,594,361 km [23.1 km/s] Difference is +166925 <= 6955 km/hour at 08.0 on 01/21 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   237,427,436 km [23.1 km/s] Difference is +167565 <= 6982 km/hour at 08.0 on 01/20 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. [2023/01/08 entering steady state] [2023/01/14 clearly back in regular movement
Next up: TYC 1820-1131-1 Mg 11.02 RA 04h 24m 40.7s Ahead of Mars and way above path on Day 0 - Day 1 above Mars
TYC 1820-888-1 Mg 11.05 well ahead of Mars at RA 04h 24m 38.1s Day 6 past Mars
TYC 1820-1205-1 Mg 10.26 RA 04h 23m 03.2s well above path Day 0 above 52 hour marker - Day 18 after Mars and above 63 hour marker
HIP 20491 Day 0 just below path and at far right of view - Day 9 past 72 hour marker Day 19 past Mars and past 31.5 hour marker
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 19 behind Mars
=== 

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

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

===
Earth Distance 2022/01/22 f119,204,606 (increasing)
Earth Distance 2022/01/21 117,511,777 (increasing)
Earth Distance 2022/01/20 116,310,383 (increasing)
===

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

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

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

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

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

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

===

Sol 026 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 026 is Thursday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/01/27 Friday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Regular Movement of Mars is under way. RA 04h 25h 10.2s vs Yesterday's RA 04h 24m 48.6s

Today on Earth: 2023/01/23 Monday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

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

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

Solar Longitude: 013.4 Sol Number: 027  Change in degrees is +.5 Julian date is: J0037027
Solar Longitude: 012.9 Sol Number: 026  Change in degrees is +.5 Julian date is: J0037026
Solar Longitude: 012.4 Sol Number: 025  Change in degrees is +.5 Julian date is: J0037025
===

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

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

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

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

===
Distance: Mars >> Sun per theskylive.com:   237,925,595 km [23.1 km/s] Difference is +165185 <= 6883 km/hour at 08.0 on 01/23 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   237,760,410 km [23.1 km/s] Difference is +166049 <= 6919 km/hour at 08.0 on 01/22 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   237,594,361 km [23.1 km/s] Difference is +166925 <= 6955 km/hour at 08.0 on 01/21 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. [2023/01/08 entering steady state] [2023/01/14 clearly back in regular movement
Next up: TYC 1816-668-1 Mg 10.88 RA 04h 27m 12.5s below path and ahead of 50 hour marker on Day 0 -
TYC 1820-1131-1 Mg 11.02 RA 04h 24m 40.7s Ahead of Mars and way above path on Day 0 - Day 2 above Mars and past
TYC 1820-888-1 Mg 11.05 well ahead of Mars at RA 04h 24m 38.1s Day 7 past Mars
HIP 20491 Day 0 just below path and at far right of view - Day 9 past 72 hour marker Day 20 past Mars and past 31.5 hour marker
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 20 behind Mars
=== 

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

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

===
Earth Distance 2022/01/23 120,026,999 (increasing)
Earth Distance 2022/01/22 119,204,606 (increasing)
Earth Distance 2022/01/21 117,511,777 (increasing)
===

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

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

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

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

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

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

===

Sol 027 is in Month 01 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  01 extends from Sol 001 through 028. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 01
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 027 is Friday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/01/28 Saturday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Regular Movement of Mars is under way. RA 04h 25h 45.3s vs Yesterday's RA 04h 25h 10.2s

Today on Earth: 2023/01/24 Tuesday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

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

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

Solar Longitude: 013.8 Sol Number: 028  Change in degrees is +.4 Julian date is: J0037028
Solar Longitude: 013.4 Sol Number: 027  Change in degrees is +.5 Julian date is: J0037027
Solar Longitude: 012.9 Sol Number: 026  Change in degrees is +.5 Julian date is: J0037026
===

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:   238,089,908 km [23.1 km/s] Difference is +164313 <= 6846 km/hour at 08.0 on 01/24 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   237,925,595 km [23.1 km/s] Difference is +165185 <= 6883 km/hour at 08.0 on 01/23 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   237,760,410 km [23.1 km/s] Difference is +166049 <= 6919 km/hour at 08.0 on 01/22 (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 is in Regular Movement as seen from Earth. [2023/01/08 entering steady state] [2023/01/14 clearly back in regular movement
TYC 1816-668-1 Mg 10.88 RA 04h 27m 12.5s below path and ahead of 50 hour marker on Day 0 - Day 1 below 47 hour marker
TYC 1820-1131-1 Mg 11.02 RA 04h 24m 40.7s Ahead of Mars and way above path on Day 0 - Day 3 above Mars and past
TYC 1820-888-1 Mg 11.05 well ahead of Mars at RA 04h 24m 38.1s Day 8 past Mars
HIP 20491 Day 0 just below path and at far right of view - Day 9 past 72 hour marker Day 21 past Mars and past 31.5 hour marker (last day for 20491)
HIP 20553 and HIP 20531 Below path Day 0 ahead of 43 hour marker - Day 21 behind Mars
=== 

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

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

===
Earth Distance 2022/01/24 121,280,555 (increasing)
Earth Distance 2022/01/23 120,026,999 (increasing)
Earth Distance 2022/01/22 119,204,606 (increasing)
===

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

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

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

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

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

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

===

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

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/01 Sunday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One Day Note: The Regular Movement of Mars is under way. This is the last daily note of the transition from Retrograde movement

Today on Earth: 2023/01/25 Wednesday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

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

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

Solar Longitude: 014.3 Sol Number: 029  Change in degrees is +.5 Julian date is: J0037029
Solar Longitude: 013.8 Sol Number: 028  Change in degrees is +.4 Julian date is: J0037028
Solar Longitude: 013.4 Sol Number: 027  Change in degrees is +.5 Julian date is: J0037027
===

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:   238,253,332 km [23.1 km/s] Difference is +163424 <= 6809 km/hour at 08.0 on 01/25 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   238,089,908 km [23.1 km/s] Difference is +164313 <= 6846 km/hour at 08.0 on 01/24 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   237,925,595 km [23.1 km/s] Difference is +165185 <= 6883 km/hour at 08.0 on 01/23 (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 is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Next up: HIP 20834 Mg 9.34 RA 04h 27m 52.7s below path and just ahead of 44 hour marker on Day 0 -
TYC 1816-668-1 Mg 10.88 RA 04h 27m 12.5s below path and ahead of 50 hour marker on Day 0 - Day 2 below 22 hour marker
=== 

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

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

===
Earth Distance 2022/01/25 122,653,355 (increasing)
Earth Distance 2022/01/24 121,280,555 (increasing)
Earth Distance 2022/01/23 120,026,999 (increasing)
===

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

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

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

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

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

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

===

Sol 029 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 029 is Sunday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/03 Tuesday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/01/27 Friday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

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

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

Solar Longitude: 015.3 Sol Number: 031  Change in degrees is +.5 Julian date is: J0037031
Solar Longitude: 014.8 Sol Number: 030  Change in degrees is +.5 Julian date is: J0037030
Solar Longitude: 014.3 Sol Number: 029  Change in degrees is +.5 Julian date is: J0037029
===

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:   238,577,469 km [23.0 km/s] Difference is +161605 <= 6733 km/hour at 08.0 on 01/27 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   238,415,864 km [23.0 km/s] Difference is +162532 <= 6772 km/hour at 08.0 on 01/26 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   238,253,332 km [23.1 km/s] Difference is +163424 <= 6809 km/hour at 08.0 on 01/25 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
No labeled objects are available to left of HIP 20834.
HIP 20834 Mg 9.34 RA 04h 27m 52.7s below path and just ahead of 44 hour marker on Day 0 - Day 2 below Mars
TYC 1816-668-1 Mg 10.88 RA 04h 27m 12.5s below path and ahead of 50 hour marker on Day 0 - Day 4 below 19 hour marker
=== 

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

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

===
Earth Distance 2022/01/27 125,147,888 (increasing)
Earth Distance 2022/01/26 123,880,904 (increasing)
Earth Distance 2022/01/25 122,653,355 (increasing)
===

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

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

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

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

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

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

===

Sol 031 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 031 is Tuesday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/04 Wednesday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/01/28 Saturday (Earth Date) Post Title: Today on Mars   [Perihelion occurred June 20, 2022 Earth Calendar]

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

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

Solar Longitude: 015.7 Sol Number: 032  Change in degrees is +.4 Julian date is: J0037032
Solar Longitude: 015.3 Sol Number: 031  Change in degrees is +.5 Julian date is: J0037031
Solar Longitude: 014.8 Sol Number: 030  Change in degrees is +.5 Julian date is: J0037030
===

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:   238,738,173 km [23.0 km/s] Difference is +160704 <= 6696 km/hour at 08.0 on 01/28 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   238,577,469 km [23.0 km/s] Difference is +161605 <= 6733 km/hour at 08.0 on 01/27 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   238,415,864 km [23.0 km/s] Difference is +162532 <= 6772 km/hour at 08.0 on 01/26 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
No labeled objects are available to left of HIP 20834.
HIP 20834 Mg 9.34 RA 04h 27m 52.7s below path and just ahead of 44 hour marker on Day 0 - Day 3 below 17.5 hour marker past Mars
TYC 1816-668-1 Mg 10.88 RA 04h 27m 12.5s below path and ahead of 50 hour marker on Day 0 - Day 5 below and past 35 hour marker
=== 

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

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

===
Earth Distance 2022/01/28 126,435,958 (increasing)
Earth Distance 2022/01/27 125,147,888 (increasing)
Earth Distance 2022/01/26 123,880,904 (increasing)
===

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

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

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

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

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

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

===

Sol 032 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 032 is Wednesday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/05 Thursday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/01/29 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 opposition/perigee/aphelion

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

Solar Longitude: 016.2 Sol Number: 033  Change in degrees is +.5 Julian date is: J0037033
Solar Longitude: 015.7 Sol Number: 032  Change in degrees is +.4 Julian date is: J0037032
Solar Longitude: 015.3 Sol Number: 031  Change in degrees is +.5 Julian date is: J0037031
===

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:   238,897,894 km [23.0 km/s] Difference is +159721 <= 6655 km/hour at 08.0 on 01/29 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   238,738,173 km [23.0 km/s] Difference is +160704 <= 6696 km/hour at 08.0 on 01/28 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Next up: A circular asterism below path at RA 04h 30m 41.7s Day 0 under 35 hour marker ahead of Mars
No labeled objects are available to left of HIP 20834.
HIP 20834 Mg 9.34 RA 04h 27m 52.7s below path and just ahead of 44 hour marker on Day 0 - Day 4 below 35 hour marker past Mars (last day)
=== 

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

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

===
Earth Distance 2022/01/29 127,785,777 (increasing)
Earth Distance 2022/01/28 126,435,958 (increasing)
Earth Distance 2022/01/27 125,147,888 (increasing)
===

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

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

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

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

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

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

===

Sol 033 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 033 is Thursday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/06 Friday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/01/30 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 opposition/perigee/aphelion

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

Solar Longitude: 016.7 Sol Number: 034  Change in degrees is +.5 Julian date is: J0037034
Solar Longitude: 016.2 Sol Number: 033  Change in degrees is +.5 Julian date is: J0037033
Solar Longitude: 015.7 Sol Number: 032  Change in degrees is +.4 Julian date is: J0037032
===

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:   239,056,742 km [23.0 km/s] Difference is +158848 <= 6618 km/hour at 08.0 on 01/30 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   238,897,894 km [23.0 km/s] Difference is +159721 <= 6655 km/hour at 08.0 on 01/29 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   238,738,173 km [23.0 km/s] Difference is +160704 <= 6696 km/hour at 08.0 on 01/28 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
A circular asterism below path at RA 04h 30m 41.7s Day 0 under 35 hour marker ahead of Mars - Day 1 under 15 hours before Mars marker
No labeled objects are available to left of HIP 20834. Still the case on 2023/01/30
HIP 20834 Mg 9.34 RA 04h 27m 52.7s below path and just ahead of 44 hour marker on Day 0 - Day 5 ar far right of view - last day for HIP 20834
=== 

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

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

===
Earth Distance 2022/01/29 127,785,777 (increasing)
Earth Distance 2022/01/29 127,785,777 (increasing)
Earth Distance 2022/01/28 126,435,958 (increasing)
===

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

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

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

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

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

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

===

Sol 034 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 034 is Friday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

In preparation of the Daily Mars Business calendar update, I am using several resources.  Occasionally the limitations of those resources prevent positive identification of objects near the path of Mars, as seen from Earth.

Today i explored the range of offerings for star identification, and discovered massive, almost overwhelming options.  I chose one of the many offerings, and sent a contact form request for help.

https://heasarc.gsfc.nasa.gov/cgi-bin/Feedback

Thank you for submitting your feedback!
Your e-mail has been sent.

Subject: Requesting help finding star by coordinates

I am preparing a daily report on the positon of Mars for a forum of the Mars Society. I'm using theskylive.com as my primary resource, and www-mars.imd.jussieu.fr for additional details. I have a TYC star in view but I cannot see the details on theskylive.com because the star is obscured by the page banner. I can obtain the coordinates of the star using the mouse location pointer: RA 04h 32m 05.3s Dec 24 56 14.7

Is there a way to request details about a star if all I have are the coordinates?

Thanks!
If you care to see my work, it is visible at:
newmars.com/forums Topic: Mars Business Calendar

tahanson43206 (Junior moderator)

(th)

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/07 Saturday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/01/31 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 opposition/perigee/aphelion

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

Solar Longitude: 017.2 Sol Number: 035  Change in degrees is +.5 Julian date is: J0037035
Solar Longitude: 016.7 Sol Number: 034  Change in degrees is +.5 Julian date is: J0037034
Solar Longitude: 016.2 Sol Number: 033  Change in degrees is +.5 Julian date is: J0037033
===

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:   239,214,570 km [23.0 km/s] Difference is +157828 <= 6576 km/hour at 08.0 on 01/31 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,056,742 km [23.0 km/s] Difference is +158848 <= 6618 km/hour at 08.0 on 01/30 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   238,897,894 km [23.0 km/s] Difference is +159721 <= 6655 km/hour at 08.0 on 01/29 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Next up: asterism just above path and ahead of mars Day 0 - kite shape at RA 04h 32m 35.0s
Next up: Star far above path and ahead of Mars on Day 0 - TYC ????-????-1 RA 04h 32m 05.3s Dec 24 degrees 56 minutes 14.7 seconds above 32 marker
*** Thanks to the NASA High Energy Research Center. The star is TYC 1833-138-1
A circular asterism below path at RA 04h 30m 41.7s Day 0 under 35 hour marker ahead of Mars - Day 2 under 16 hours after marker
=== 

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

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

===
Earth Distance 2022/01/31 130,479,544 (increasing)
Earth Distance 2022/01/30 ???,???,??? (increasing)
Earth Distance 2022/01/29 127,785,777 (increasing)
===

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

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

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

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

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

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

===

Sol 035 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 035 is Saturday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/08 Sunday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/02/01 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 opposition/perigee/aphelion

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

Solar Longitude: 017.6 Sol Number: 036  Change in degrees is +.4 Julian date is: J0037036
Solar Longitude: 017.2 Sol Number: 035  Change in degrees is +.5 Julian date is: J0037035
Solar Longitude: 016.7 Sol Number: 034  Change in degrees is +.5 Julian date is: J0037034
===

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:   239,371,485 km [22.9 km/s] Difference is +156915 <= 6538 km/hour at 08.0 on 02/01 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,214,570 km [23.0 km/s] Difference is +157828 <= 6576 km/hour at 08.0 on 01/31 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,056,742 km [23.0 km/s] Difference is +158848 <= 6618 km/hour at 08.0 on 01/30 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Look up test: TYC at ra 04h 34m 37.4s Dec 24 38 53.9 -
Next up: HIP 21275 Mg 9.09 RA 04h 33m 51.8s below path and ahead of 29 hour marker on Day 0 -
Asterism just above path and ahead of mars Day 0 - kite shape at RA 04h 32m 35.0s - Day 1 above 14.5 hour marker
Star far above path and ahead of Mars on Day 0 - TYC 1833-867-1 RA 04h 33m 43.2s Day 1 ahead of 29 hour marker
A circular asterism below path at RA 04h 30m 41.7s Day 0 under 35 hour marker ahead of Mars - Day 3 under 29 hours after marker
=== 

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

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

===
Earth Distance 2022/02/01 131,858,888 (increasing)
Earth Distance 2022/01/31 130,479,544 (increasing)
Earth Distance 2022/01/30 ???,???,??? (increasing)
===

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

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

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

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

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

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

===

Sol 036 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 036 is Sunday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/09 Monday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/02/02 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 opposition/perigee/aphelion

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

Solar Longitude: 018.1 Sol Number: 037  Change in degrees is +.5 Julian date is: J0037037
Solar Longitude: 017.6 Sol Number: 036  Change in degrees is +.4 Julian date is: J0037036
Solar Longitude: 017.2 Sol Number: 035  Change in degrees is +.5 Julian date is: J0037035
===

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:   239,527,387 km [22.9 km/s] Difference is +155902 <= 6496 km/hour at 08.0 on 02/02 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,371,485 km [22.9 km/s] Difference is +156915 <= 6538 km/hour at 08.0 on 02/01 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,214,570 km [23.0 km/s] Difference is +157828 <= 6576 km/hour at 08.0 on 01/31 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Look up test: TYC at ra 04h 34m 37.4s Dec 24 38 53.9 -  <<== first attempt failed. Mouse coordinates were too far from actual: 4 34 36.5, 24 34 29.3
Another problem showed up ... the star display in theskylive.com does not show which star it is showing. The display is near the star.
HIP 21275 Mg 9.09 RA 04h 33m 51.8s below path and ahead of 29 hour marker on Day 0 -Day 1 under 14.5 hour marker ahead of Mars
Asterism just above path and ahead of mars Day 0 - kite shape at RA 04h 32m 35.0s - Day 2 past Mars
Star far above path and ahead of Mars on Day 0 - TYC 1833-867-1 RA 04h 33m 43.2s Day 2 above 14.5 hour marker
A circular asterism below path at RA 04h 30m 41.7s Day 0 under 35 hour marker ahead of Mars - Day 4 at right edge of view - last day for circle
=== 

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

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

===
Earth Distance 2022/02/02 133,163,608 (increasing)
Earth Distance 2022/02/01 131,858,888 (increasing)
Earth Distance 2022/01/31 130,479,544 (increasing)
===

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

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

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

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

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

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

===

Sol 037 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 037 is Monday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/10 Tuesday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/02/03 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 opposition/perigee/aphelion

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

Solar Longitude: 018.6 Sol Number: 038  Change in degrees is +.5 Julian date is: J0037038
Solar Longitude: 018.1 Sol Number: 037  Change in degrees is +.5 Julian date is: J0037037
Solar Longitude: 017.6 Sol Number: 036  Change in degrees is +.4 Julian date is: J0037036
===

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:   239,682,329 km [22.9 km/s] Difference is +154942 <= 6456 km/hour at 08.0 on 02/03 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,527,387 km [22.9 km/s] Difference is +155902 <= 6496 km/hour at 08.0 on 02/02 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,371,485 km [22.9 km/s] Difference is +156915 <= 6538 km/hour at 08.0 on 02/01 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Next up: Star above path and ahead of 27 hour marker on Day 0 - TYC 1833-720-1 RA 04h 35m 38.2s
HIP 21275 Mg 9.09 RA 04h 33m 51.8s below path and ahead of 29 hour marker on Day 0 -Day 2 past Mars
Asterism just above path and ahead of mars Day 0 - kite shape at RA 04h 32m 35.0s -  past Mars  and past 27 hour marker
Star far above path and ahead of Mars on Day 0 - TYC 1833-867-1 RA 04h 33m 43.2s Day 3 above and past Mars
=== 

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

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

===
Earth Distance 2022/02/03 134,509,555 (increasing)
Earth Distance 2022/02/02 133,163,608 (increasing)
Earth Distance 2022/02/01 131,858,888 (increasing)
===

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

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

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

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

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

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

===

Sol 038 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 038 is Tuesday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/11 Wednesday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/02/04 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 opposition/perigee/aphelion

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

Solar Longitude: 019.1 Sol Number: 039  Change in degrees is +.5 Julian date is: J0037039
Solar Longitude: 018.6 Sol Number: 038  Change in degrees is +.5 Julian date is: J0037038
Solar Longitude: 018.1 Sol Number: 037  Change in degrees is +.5 Julian date is: J0037037
===

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:   239,836,287 km [22.9 km/s] Difference is +153958 <= 6415 km/hour at 08.0 on 02/04 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,682,329 km [22.9 km/s] Difference is +154942 <= 6456 km/hour at 08.0 on 02/03 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,527,387 km [22.9 km/s] Difference is +155902 <= 6496 km/hour at 08.0 on 02/02 (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 is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Next up: trio of galaxies: PGC 86267, 3097124 and furthest East: PGC 3097125 RA 04h 37m 19.4s Day 0 in path and well ahead
Star above path and ahead of 27 hour marker on Day 0 - TYC 1833-720-1 RA 04h 35m 38.2s  - Day 1 above 13 hours ahead marker
HIP 21275 Mg 9.09 RA 04h 33m 51.8s below path and ahead of 29 hour marker on Day 0 -Day 3 past Mars  -last day for 21275
Star far above path and ahead of Mars on Day 0 - TYC 1833-867-1 RA 04h 33m 43.2s Day 4 above and past Mars
=== 

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

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

===
Earth Distance 2022/02/04 135,891,379 (increasing)
Earth Distance 2022/02/03 134,509,555 (increasing)
Earth Distance 2022/02/02 133,163,608 (increasing)
===

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

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

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

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

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

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

===

Sol 039 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 039 is Wednesday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/12 Thursday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/02/05 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 opposition/perigee/aphelion

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

Solar Longitude: 019.5 Sol Number: 040  Change in degrees is +.4 Julian date is: J0037040
Solar Longitude: 019.1 Sol Number: 039  Change in degrees is +.5 Julian date is: J0037039
Solar Longitude: 018.6 Sol Number: 038  Change in degrees is +.5 Julian date is: J0037038
===

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:   239,989,327 km [22.9 km/s] Difference is +153040 <= 6377 km/hour at 08.0 on 02/05 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,836,287 km [22.9 km/s] Difference is +153958 <= 6415 km/hour at 08.0 on 02/04 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,682,329 km [22.9 km/s] Difference is +154942 <= 6456 km/hour at 08.0 on 02/03 (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 is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Next up: TYC 1834-401-1 RA 04h 38m 55.9s just below path Day 0 at far left of view
Trio of galaxies: PGC 86267, 3097124 and furthest East: PGC 3097125 RA 04h 37m 19.4s Day 0 in path - Day 1 at 26 hour marker
Star above path and ahead of 27 hour marker on Day 0 - TYC 1833-720-1 RA 04h 35m 38.2s  - Day 2 Past Mars ahead of 13 hour marker
=== 

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

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2022/02/05 137,261,043 (increasing)
Earth Distance 2022/02/04 135,891,379 (increasing)
Earth Distance 2022/02/03 134,509,555 (increasing)
===

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

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

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

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

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

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

===

Sol 040 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 040 is Thursday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/13 Friday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/02/06 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 opposition/perigee/aphelion

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

Solar Longitude: 020.0 Sol Number: 041  Change in degrees is +.5 Julian date is: J0037041
Solar Longitude: 019.5 Sol Number: 040  Change in degrees is +.4 Julian date is: J0037040
Solar Longitude: 019.1 Sol Number: 039  Change in degrees is +.5 Julian date is: J0037039
===

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:   240,141,187 km [22.9 km/s] Difference is +151860 <= 6328 km/hour at 08.0 on 02/06 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,989,327 km [22.9 km/s] Difference is +153040 <= 6377 km/hour at 08.0 on 02/05 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,836,287 km [22.9 km/s] Difference is +153958 <= 6415 km/hour at 08.0 on 02/04 (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 is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
TYC 1834-401-1 RA 04h 38m 55.9s just below path Day 0 at far left of view - Day 1 ahead of 24 hour marker
Trio of galaxies: PGC 86267, 3097124 and furthest East: PGC 3097125 RA 04h 37m 19.4s Day 0 in path - Day 2 right at Mars
Star above path and ahead of 27 hour marker on Day 0 - TYC 1833-720-1 RA 04h 35m 38.2s  - Day 3 Past Mars past 24 hour marker
=== 

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

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2022/02/06 138,651,400 (increasing)
Earth Distance 2022/02/05 137,261,043 (increasing)
Earth Distance 2022/02/04 135,891,379 (increasing)
===

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

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

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

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

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

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

===

Sol 041 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 041 is Friday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/14 Saturday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/02/07 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 opposition/perigee/aphelion

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

Solar Longitude: 020.5 Sol Number: 042  Change in degrees is +.5 Julian date is: J0037042
Solar Longitude: 020.0 Sol Number: 041  Change in degrees is +.5 Julian date is: J0037041
Solar Longitude: 019.5 Sol Number: 040  Change in degrees is +.4 Julian date is: J0037040
===

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:   240,292,119 km [22.9 km/s] Difference is +150932 <= 6289 km/hour at 08.0 on 02/07 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   240,141,187 km [22.9 km/s] Difference is +151860 <= 6328 km/hour at 08.0 on 02/06 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   239,989,327 km [22.9 km/s] Difference is +153040 <= 6377 km/hour at 08.0 on 02/05 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Next up: Galaxy PGC 3097126 RA 04h 39m 58.5s Day 0 above path and ahead of 24 hour marker
TYC 1834-401-1 RA 04h 38m 55.9s just below path Day 0 at far left of view - Day 2 just below and ahead of Mars
Trio of galaxies: PGC 86267, 3097124 and furthest East: PGC 3097125 RA 04h 37m 19.4s Day 0 in path - Day 3 right at 24 hour past marker
=== 

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

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2022/02/07 140,094,048 (increasing)
Earth Distance 2022/02/06 138,651,400 (increasing)
Earth Distance 2022/02/05 137,261,043 (increasing)
===

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

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

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

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

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

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

===

Sol 042 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 042 is Saturday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/15 Sunday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/02/08 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 opposition/perigee/aphelion

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

Solar Longitude: 020.9 Sol Number: 043  Change in degrees is +.4 Julian date is: J0037043
Solar Longitude: 020.5 Sol Number: 042  Change in degrees is +.5 Julian date is: J0037042
Solar Longitude: 020.0 Sol Number: 041  Change in degrees is +.5 Julian date is: J0037041
===

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:   240,442,042 km [22.8 km/s] Difference is +149923 <= 6247 km/hour at 08.0 on 02/08 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   240,292,119 km [22.9 km/s] Difference is +150932 <= 6289 km/hour at 08.0 on 02/07 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   240,141,187 km [22.9 km/s] Difference is +151860 <= 6328 km/hour at 08.0 on 02/06 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Next up: A fairly bright star below path and at far left: RA 04h 41m 46.4s - label will be available tomorrow
Galaxy PGC 3097126 RA 04h 39m 58.5s Day 0 above path and ahead of 24 hour marker - Day 1 Ahead of Mars
TYC 1834-401-1 RA 04h 38m 55.9s just below path Day 0 at far left of view - Day 3 past 11.5 hour marker
=== 

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

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2022/02/08 141,439,999 (increasing)
Earth Distance 2022/02/07 140,094,048 (increasing)
Earth Distance 2022/02/06 138,651,400 (increasing)
===

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

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

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

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

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

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

===

Sol 043 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 043 is Sunday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

SearchTerm:TodayOnMars
SearchTerm:CalendarForMars

Today on Mars: 0037/02/16 Monday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/02/09 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 opposition/perigee/aphelion

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

Solar Longitude: 021.4 Sol Number: 044  Change in degrees is +.4 Julian date is: J0037044
Solar Longitude: 020.9 Sol Number: 043  Change in degrees is +.4 Julian date is: J0037043
Solar Longitude: 020.5 Sol Number: 042  Change in degrees is +.5 Julian date is: J0037042
===

Shortened daily report due to Server issues

(th)

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/17 Tuesday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One day note: Internal Server Error occurred during update of this record on 2023/02/09 - This is a test after a wait of hours

Today on Earth: 2023/02/10 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 opposition/perigee/aphelion

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

Solar Longitude: 021.9 Sol Number: 045  Change in degrees is +.5 Julian date is: J0037045
Solar Longitude: 021.4 Sol Number: 044  Change in degrees is +.5 Julian date is: J0037044
Solar Longitude: 020.9 Sol Number: 043  Change in degrees is +.4 Julian date is: J0037043
===

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:   240,738,729 km [22.8 km/s] Difference is +147827 <= 6159 km/hour at 08.0 on 02/10 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   240,590,902 km [22.8 km/s] Difference is +148860 <= 6202 km/hour at 08.0 on 02/09 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   240,442,042 km [22.8 km/s] Difference is +149923 <= 6247 km/hour at 08.0 on 02/08 (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 is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
TYC star below path and at far left: Estimated: RA 04h 41m 46.4s - TYC 1834-339-1 RA 04h 41m 47.2s - days later - past Mars
Galaxy PGC 3097126 RA 04h 39m 58.5s Day 0 above path and ahead of 24 hour marker - Day 1 Ahead of Mars - Day 2 past Mars
=== 

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

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2022/02/10 144,304,444 (increasing)
Earth Distance 2022/02/08 141,439,999 (increasing)
Earth Distance 2022/02/07 140,094,048 (increasing)
===

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

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

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

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

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

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

===

Sol 045 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 045 is Tuesday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

Month 2 of 24: Month 2 of Quarter 1 Year 36  (This month has 28 Sols)

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/18 Wednesday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/02/11 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 opposition/perigee/aphelion

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

Solar Longitude: 022.3 Sol Number: 046  Change in degrees is +.4 Julian date is: J0037046
Solar Longitude: 021.9 Sol Number: 045  Change in degrees is +.5 Julian date is: J0037045
Solar Longitude: 021.4 Sol Number: 044  Change in degrees is +.5 Julian date is: J0037044
===

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:   240,885,504 km [22.8 km/s] Difference is +146775 <= 6116 km/hour at 08.0 on 02/11 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   240,738,729 km [22.8 km/s] Difference is +147827 <= 6159 km/hour at 08.0 on 02/10 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   240,590,902 km [22.8 km/s] Difference is +148860 <= 6202 km/hour at 08.0 on 02/09 (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 is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Next up: No labelled objects: Asterism: V shape arrow head above path: RA 04h 45m 17.8s Day 0 far left
TYC star below path and at far left: Estimated: RA 04h 41m 46.4s - TYC 1834-339-1 RA 04h 41m 47.2s - days later - past Mars - still there - last day
=== 

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

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2022/02/11 145,697,777 (increasing)
Earth Distance 2022/02/10 144,304,444 (increasing)
Earth Distance 2022/02/08 141,439,999 (increasing)
===

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

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

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

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

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

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

===

Sol 046 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 046 is Wednesday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/19 Thursday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/02/12 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 opposition/perigee/aphelion

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

Solar Longitude: 022.8 Sol Number: 047  Change in degrees is +.5 Julian date is: J0037047
Solar Longitude: 022.3 Sol Number: 046  Change in degrees is +.4 Julian date is: J0037046
Solar Longitude: 021.9 Sol Number: 045  Change in degrees is +.5 Julian date is: J0037045
===

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:   241,031,227 km [22.8 km/s] Difference is +145723 <= 6072 km/hour at 08.0 on 02/12 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   240,885,504 km [22.8 km/s] Difference is +146775 <= 6116 km/hour at 08.0 on 02/11 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   240,738,729 km [22.8 km/s] Difference is +147827 <= 6159 km/hour at 08.0 on 02/10 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Next up: Galaxy PGC 1726879 RA 04h 45m 56.9s above 21 hour marker ahead of Mars on Day 0
Asterism: V shape arrow head (funnel) above path: RA 04h 45m 17.8s Day 0 far left - Day 1 still ahead of Mars
=== 

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

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2022/02/12 147,133,444 (increasing)
Earth Distance 2022/02/11 145,697,777 (increasing)
Earth Distance 2022/02/10 144,304,444 (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 were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

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

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

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

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

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

===

Sol 047 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 047 is Thursday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

Month 2 of 24: Month 2 of Quarter 1 Year 36  (This month has 28 Sols)

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/20 Friday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

One day note: TheSkyLive.com/mars-tracker is showing Asteroid 2015 BN509 directly below Mars.

Today on Earth: 2023/02/13 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 opposition/perigee/aphelion

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

Solar Longitude: 023.3 Sol Number: 048  Change in degrees is +.5 Julian date is: J0037048
Solar Longitude: 022.8 Sol Number: 047  Change in degrees is +.5 Julian date is: J0037047
Solar Longitude: 022.3 Sol Number: 046  Change in degrees is +.4 Julian date is: J0037046

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:   241,175,860 km [22.8 km/s] Difference is +144633 <= 6026 km/hour at 08.0 on 02/13 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   241,031,227 km [22.8 km/s] Difference is +145723 <= 6072 km/hour at 08.0 on 02/12 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   240,885,504 km [22.8 km/s] Difference is +146775 <= 6116 km/hour at 08.0 on 02/11 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Star HIP 22334 Mg  8.22 RA 04h 44m 35.2s Far below path Day 0 at far left of view
Galaxy PGC 1726879 RA 04h 45m 56.9s above 21 hour marker ahead of Mars on Day 0  - Day 1 directly above Mars
Asterism: V shape arrow head (funnel) above path: RA 04h 45m 17.8s Day 0 far left - Day 2 just past Mars at 10.5 marker
=== 

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

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2022/02/13 148,566,480 (increasing)
Earth Distance 2022/02/12 147,133,444 (increasing)
Earth Distance 2022/02/11 145,697,777 (increasing)
===

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

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

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

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

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

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

===

Sol 048 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 048 is Friday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

Month 2 of 24: Month 2 of Quarter 1 Year 36  (This month has 28 Sols)

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/21 Saturday <<-- Days of the week offset 3 with Earth.  (count from Mars to Earth (updated 2022/12/24))

Today on Earth: 2023/02/14 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 opposition/perigee/aphelion

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

Solar Longitude: 023.7 Sol Number: 049  Change in degrees is +.4 Julian date is: J0037049
Solar Longitude: 023.3 Sol Number: 048  Change in degrees is +.5 Julian date is: J0037048
Solar Longitude: 022.8 Sol Number: 047  Change in degrees is +.5 Julian date is: J0037047

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:   241,319,433 km [22.8 km/s] Difference is +143573 <= 5982 km/hour at 08.0 on 02/14 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   241,175,860 km [22.8 km/s] Difference is +144633 <= 6026 km/hour at 08.0 on 02/13 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   241,031,227 km [22.8 km/s] Difference is +145723 <= 6072 km/hour at 08.0 on 02/12 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Next up: TYC 1835-734-1 Mg 11.19 RA 04h 49m 50.1s below path Day 0 - far left
Star HIP 22334 Mg  8.22 RA 04h 44m 35.2s Far below path Day 0 at far left of view - Day 1 ahead of 20 hour marker
Galaxy PGC 1726879 RA 04h 45m 56.9s above 21 hour marker ahead of Mars on Day 0  - Day 2 at far right - last day for 1726879
Asterism: V shape arrow head (funnel) above path: RA 04h 45m 17.8s Day 0 far left - Day 3 above 20 hours past marker
=== 

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

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2022/02/14 150,016,037 (increasing)
Earth Distance 2022/02/13 148,566,480 (increasing)
Earth Distance 2022/02/12 147,133,444 (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 were in Opposition (Earth center)  in December of 2022.  The date coincided with a (very rare) occultation of Mars by the Moon.
Mars and Earth appear to have been as close as they will get in this cycle. 81,454,323 kilometers on J0036644 Time: 4.53 minutes - 9 minutes round trip

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

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

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

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

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

===

Sol 049 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 049 is Saturday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

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

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

For current weather on Mars see:

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

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

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

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

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

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

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

Month 2 of 24: Month 2 of Quarter 1 Year 36  (This month has 28 Sols)

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,442

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

Today on Mars: 0037/02/21 Saturday <<-- Days of the week offset 4 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 March 24 on Earth

Today on Earth: 2023/02/15 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 opposition/perigee/aphelion

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

Solar Longitude: 024.2 Sol Number: 049  Change in degrees is +.5 Julian date is: J0037049 << Skip Day on Mars
Solar Longitude: 023.7 Sol Number: 049  Change in degrees is +.4 Julian date is: J0037049
Solar Longitude: 023.3 Sol Number: 048  Change in degrees is +.5 Julian date is: J0037048

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:   241,461,840 km [22.7 km/s] Difference is +142407 <= 5934 km/hour at 08.0 on 02/15 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   241,319,433 km [22.8 km/s] Difference is +143573 <= 5982 km/hour at 08.0 on 02/14 (time 8:00) <<== 24.0 hours
Distance: Mars >> Sun per theskylive.com:   241,175,860 km [22.8 km/s] Difference is +144633 <= 6026 km/hour at 08.0 on 02/13 (time 8:00) <<== 24.0 hours
===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from right to left in the view from Earth.
Next up: Galaxy below path PGC 1716903 RA 04h 51m 08.4s Day 0 at far left
TYC 1835-734-1 Mg 11.19 RA 04h 49m 50.1s below path Day 0 - far left - Day 1 - under 10 hour marker
Star HIP 22334 Mg  8.22 RA 04h 44m 35.2s Far below path Day 0 at far left of view - Day 2 just ahead of Mars
=== 

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

Note: The curve of the path of Mars as seen against the background of stars is now a line heading straight to the left at a slight upward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2022/02/15 151,428,888 (increasing)
Earth Distance 2022/02/14 150,016,037 (increasing)
Earth Distance 2022/02/13 148,566,480 (increasing)
===

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

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

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

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

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

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

===

Sol 049 is in Month 02 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  02 extends from Sol 029 through 056. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 02
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 049 is Saturday  in the Proposed Business calendar for Mars.  Sol 012 was a skip day on Earth. Year 37 Sol 49 is next expected skip day.

---

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

The last Skip Day occurred  February 15, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected March 24, 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 2 of 24: Month 2 of Quarter 1 Year 36  (This month has 28 Sols)