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

tahanson43206 · 2023-04-30 06:21:07

===
Today on Mars: 0037/05/09 Monday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/03/24))
One day note: Today is a skip day on Mars. The next skip day will be June 6th on Earth.
Today on Earth: 2023/04/30 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: 2 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 057.5 Sol Number: 121 Change in degrees is +.5 Julian date is: J0037121
Solar Longitude: 057.0 Sol Number: 121 Change in degrees is +.4 Julian date is: J0037121
Solar Longitude: 056.6 Sol Number: 120 Change in degrees is +.4 Julian date is: J0037120
===

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: 248,536,787 km [22.0 km/s] Difference is +45635 <= 1901 km/hour at 08.0 on 04/30 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,491,152 km [22.0 km/s] Difference is +47095 <= 1962 km/hour at 08.0 on 04/29 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,444,057 km [22.0 km/s] Difference is +48543 <= 2022 km/hour at 08.0 on 04/28 (time 8:00) (24 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 just above path at far left: TYC 1910-693-1 Mg 11.72 RA 07h 24m 28.8s Day 0 -
TYC 1909-1793-1 Mg 11.37 RA 07h 20m 25.8s just above path Day 0 – Day 1 Past 12 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 2023/04/30 259,999,999 (increasing)
Earth Distance 2023/04/29 258,039,182 (increasing)
Earth Distance 2023/04/28 256,745,777 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ 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 121 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 121 is Monday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-01 06:05:20

===
Today on Mars: 0037/05/10 Tuesday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/01 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: 2 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 057.9 Sol Number: 122 Change in degrees is +.4 Julian date is: J0037122
Solar Longitude: 057.5 Sol Number: 121 Change in degrees is +.5 Julian date is: J0037121 << Skip Day on Mars
Solar Longitude: 057.0 Sol Number: 121 Change in degrees is +.4 Julian date is: J0037121
===

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: 248,580,962 km [22.0 km/s] Difference is +44175 <= 1841 km/hour at 08.0 on 05/01 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,536,787 km [22.0 km/s] Difference is +45635 <= 1901 km/hour at 08.0 on 04/30 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,491,152 km [22.0 km/s] Difference is +47095 <= 1962 km/hour at 08.0 on 04/29 (time 8:00) (24 hours)
===

tahanson43206 · 2023-05-01 06:32:54

Part 2 of 3 of Daily Report - split due to Apache Internal Server Error

Next up: Star in path at far left TYC 1910-284-1 Mg 10.20 Day 0 -

tahanson43206 · 2023-05-01 06:33:56

Part 3 of 3 of Daily Report - split due to Apache Internal Server Error

===
Earth Distance 2023/05/01 260,783,333 (increasing)
Earth Distance 2023/04/30 259,999,999 (increasing)
Earth Distance 2023/04/29 258,039,182 (increasing)
===

Month 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-02 06:05:17

===
Today on Mars: 0037/05/11 Wednesday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/02 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: 2 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 058.4 Sol Number: 123 Change in degrees is +.5 Julian date is: J0037123
Solar Longitude: 057.9 Sol Number: 122 Change in degrees is +.4 Julian date is: J0037122
Solar Longitude: 057.5 Sol Number: 121 Change in degrees is +.5 Julian date is: J0037121 << Skip Day on Mars
===

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

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

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

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

===
Distance: Mars >> Sun per theskylive.com: 248,623,689 km [22.0 km/s] Difference is +42727 <= 1780 km/hour at 08.0 on 05/02 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,580,962 km [22.0 km/s] Difference is +44175 <= 1841 km/hour at 08.0 on 05/01 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,536,787 km [22.0 km/s] Difference is +45635 <= 1901 km/hour at 08.0 on 04/30 (time 8:00) (24 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 – pair of galaxies above and below path: PGC 1691950 and PGC 1691270 Day 0 far left -
TYC 1910-284-1 Mg 10.20 Day 0 -Day 1 above and just past Mars RA 07h 25m 52.1s
TYC 1910-693-1 Mg 11.72 RA 07h 24m 28.8s Day 0 - - Day 1 above 12 hours ahead marker – Day 2 at far right – last day for 693
===

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 2023/05/02 262,369,999 (increasing)
Earth Distance 2023/05/01 260,783,333 (increasing)
Earth Distance 2023/04/30 259,999,999 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ 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 123 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 123 is Wednesday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-03 06:07:23

===
Today on Mars: 0037/05/12 Thursday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/03 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: 2 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 058.8 Sol Number: 124 Change in degrees is +.4 Julian date is: J0037124
Solar Longitude: 058.4 Sol Number: 123 Change in degrees is +.5 Julian date is: J0037123
Solar Longitude: 057.9 Sol Number: 122 Change in degrees is +.4 Julian date is: J0037122
===

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: 248,664,945 km [22.0 km/s] Difference is +41256 <= 1719 km/hour at 08.0 on 05/03 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,623,689 km [22.0 km/s] Difference is +42727 <= 1780 km/hour at 08.0 on 05/02 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,580,962 km [22.0 km/s] Difference is +44175 <= 1841 km/hour at 08.0 on 05/01 (time 8:00) (24 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 just above path at far left on Day 0 – TYC 1910-666-1 Mg 11.43 RA 07h 29m 53.1s -
PGC 1691950 and PGC 1691270 Day 0 far left – Day 1 just ahead of Mars
TYC 1910-284-1 Mg 10.20 Day 0 -Day 1 above and just past Mars RA 07h 25m 52.1s – Day 2 at far right of view – last day for 284
===

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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/03 263,475,555 (increasing)
Earth Distance 2023/05/02 262,369,999 (increasing)
Earth Distance 2023/05/01 260,783,333 (increasing)
===

Mars and Earth are moving apart after Opposition. The two planets were on opposite sides of the Sun at Earth Distance maximum October 2021.
Mars and Earth 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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ 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 124 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 124 is Thursday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-04 06:05:46

===
Today on Mars: 0037/05/13 Friday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/04 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: 2 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 058.2 Sol Number: 125 Change in degrees is +.4 Julian date is: J0037125
Solar Longitude: 058.8 Sol Number: 124 Change in degrees is +.4 Julian date is: J0037124
Solar Longitude: 058.4 Sol Number: 123 Change in degrees is +.5 Julian date is: J0037123
===

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: 248,704,726 km [22.0 km/s] Difference is +39781 <= 1658 km/hour at 08.0 on 05/04 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,664,945 km [22.0 km/s] Difference is +41256 <= 1719 km/hour at 08.0 on 05/03 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,623,689 km [22.0 km/s] Difference is +42727 <= 1780 km/hour at 08.0 on 05/02 (time 8:00) (24 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: Stars above and below path TYC 1910-1316-1 up 1911-8-1 down RA 07h 32m 06.7s Day 0 left of 12 hour marker
Day 0 – TYC 1910-666-1 Mg 11.43 RA 07h 29m 53.1s – Day 1 just past 6 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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/04 265,019,555 (increasing)
Earth Distance 2023/05/03 263,475,555 (increasing)
Earth Distance 2023/05/02 262,369,999 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ 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 125 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 125 is Friday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-05 06:05:51

===
Today on Mars: 0037/05/14 Saturday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/05 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: 2 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 059.7 Sol Number: 126 Change in degrees is +.5 Julian date is: J0037126
Solar Longitude: 059.2 Sol Number: 125 Change in degrees is +.4 Julian date is: J0037125
Solar Longitude: 058.8 Sol Number: 124 Change in degrees is +.4 Julian date is: J0037124
===

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: 248,743,051 km [22.0 km/s] Difference is +38325 <= 1597 km/hour at 08.0 on 05/05 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,704,726 km [22.0 km/s] Difference is +39781 <= 1658 km/hour at 08.0 on 05/04 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,664,945 km [22.0 km/s] Difference is +41256 <= 1719 km/hour at 08.0 on 05/03 (time 8:00) (24 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: Galaxies above and below path: Up PGC 1687432 Down PGC 1685949 RA 07h 34m 57.3s at far left on Day 0
TYC 1910-1316-1 up 1911-8-1 down RA 07h 32m 06.7s Day 0 left of 12 hour marker – Day 1 just past 5.5 hours marker – last day for these two
===

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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/05 266,155,555 (increasing)
Earth Distance 2023/05/04 265,019,555 (increasing)
Earth Distance 2023/05/03 263,475,555 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ 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 126 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 126 is Saturday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-06 06:06:50

===
Today on Mars: 0037/05/15 Sunday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/06 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 060.1 Sol Number: 127 Change in degrees is +.4 Julian date is: J0037127
Solar Longitude: 059.7 Sol Number: 126 Change in degrees is +.5 Julian date is: J0037126
Solar Longitude: 059.2 Sol Number: 125 Change in degrees is +.4 Julian date is: J0037125
===

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: 248,779,928 km [22.0 km/s] Difference is +35977 <= 1489 km/hour at 08.0 on 05/06 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,743,051 km [22.0 km/s] Difference is +38325 <= 1597 km/hour at 08.0 on 05/05 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,704,726 km [22.0 km/s] Difference is +39781 <= 1658 km/hour at 08.0 on 05/04 (time 8:00) (24 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: Two galaxies just above path: PGC 1684770 and PGC 1684559 at far left on Day 1
Up PGC 1687431 Down PGC 1685949 RA 07h 34m 57.3s at far left on Day 0 – Day 1 the pair are in a line with the 5.5 hours past marker … 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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/06 267,703,777 (increasing)
Earth Distance 2023/05/05 266,155,555 (increasing)
Earth Distance 2023/05/04 265,019,555 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ 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 127 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 127 is Sunday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 · 2023-05-07 06:07:19

===
Today on Mars: 0037/05/16 Monday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/07 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 060.6 Sol Number: 128 Change in degrees is +.5 Julian date is: J0037128
Solar Longitude: 060.1 Sol Number: 127 Change in degrees is +.4 Julian date is: J0037127
Solar Longitude: 059.7 Sol Number: 126 Change in degrees is +.5 Julian date is: J0037126
===

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: 248,815,299 km [22.0 km/s] Difference is +35371 <= 1474 km/hour at 08.0 on 05/07 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,779,928 km [22.0 km/s] Difference is +35977 <= 1489 km/hour at 08.0 on 05/06 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,743,051 km [22.0 km/s] Difference is +38325 <= 1597 km/hour at 08.0 on 05/05 (time 8:00) (24 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: MicroBoomer! HIP 37400 Mg 8.46 just above path … at far left on Day 0
PGC 1684770 and PGC 1684559 at far left on Day 0 – Day 1 over 5.5 hours past marker …. - likely last day for these two...
===

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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/07 269,364,037 (increasing)
Earth Distance 2023/05/06 267,703,777 (increasing)
Earth Distance 2023/05/05 266,155,555 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 14 and 15 minutes. Communications delay would be 28+ 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 128 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 127 is Monday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 · 2023-05-08 06:14:01

===
Today on Mars: 0037/05/17 Tuesday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/08 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 061.0 Sol Number: 129 Change in degrees is +.4 Julian date is: J0037129
Solar Longitude: 060.6 Sol Number: 128 Change in degrees is +.5 Julian date is: J0037128
Solar Longitude: 060.1 Sol Number: 127 Change in degrees is +.4 Julian date is: J0037127
===

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: 248,849,231 km [22.0 km/s] Difference is +33922 <= 1413 km/hour at 08.0 on 05/08 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,815,299 km [22.0 km/s] Difference is +35371 <= 1474 km/hour at 08.0 on 05/07 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,779,928 km [22.0 km/s] Difference is +35977 <= 1489 km/hour at 08.0 on 05/06 (time 8:00) (24 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: At far left another micro-Boomer: HIP 37522 Mg 7.32 Day 0 -
HIP 37400 Mg 8.46 just above path … at far left on Day 0 – Day 1 above and 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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/08 270,306,666 (increasing)
Earth Distance 2023/05/07 269,364,037 (increasing)
Earth Distance 2023/05/06 267,703,777 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 15 and 16 minutes. Communications delay would be 30+ 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 129 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 128 is Tuesday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-09 06:10:32

===
Today on Mars: 0037/05/18 Wednesday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/09 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 061.4 Sol Number: 130 Change in degrees is +.4 Julian date is: J0037130
Solar Longitude: 061.0 Sol Number: 129 Change in degrees is +.4 Julian date is: J0037129
Solar Longitude: 060.6 Sol Number: 128 Change in degrees is +.5 Julian date is: J0037128
===

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: 248,881,664 km [22.0 km/s] Difference is +32443 <= 1352 km/hour at 08.0 on 05/09 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,849,231 km [22.0 km/s] Difference is +33922 <= 1413 km/hour at 08.0 on 05/08 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,815,299 km [22.0 km/s] Difference is +35371 <= 1474 km/hour at 08.0 on 05/07 (time 8:00) (24 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 UGC 3987 (visible edge on) Day 0 ahead of 5.5 hours marker -
HIP 37522 Mg 7.32 Day 0 - Day 1 Still ahead of Mars – under 5.5 hours marker -
HIP 37400 Mg 8.46 just above path … at far left on Day 0 – Day 1 above and still ahead of Mars – Day 2 still there but last day for 37400
===

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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/09 271,651,555 (increasing)
Earth Distance 2023/05/08 270,306,666 (increasing)
Earth Distance 2023/05/07 269,364,037 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 15 and 16 minutes. Communications delay would be 30+ 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 130 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 130 is Wednesday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-10 06:42:36

===
Today on Mars: 0037/05/19 Thursday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/10 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 061.9 Sol Number: 131 Change in degrees is +.5 Julian date is: J0037131
Solar Longitude: 061.4 Sol Number: 130 Change in degrees is +.4 Julian date is: J0037130
Solar Longitude: 061.0 Sol Number: 129 Change in degrees is +.4 Julian date is: J0037129
===

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: 248,912,640 km [22.0 km/s] Difference is +30976 <= 1291 km/hour at 08.0 on 05/10 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,881,664 km [22.0 km/s] Difference is +32443 <= 1352 km/hour at 08.0 on 05/09 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,849,231 km [22.0 km/s] Difference is +33922 <= 1413 km/hour at 08.0 on 05/08 (time 8:00) (24 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 right at 11 hours ahead marker on Day 0: PGC 1677835
UGC 3987 (visible edge on) Day 0 ahead of 5.5 hours marker – Day 1 below 11 hurs past marker
HIP 37522 Mg 7.32 Day 0 - Day 1 Still ahead of Mars – under 5.5 hours marker – Day 2 still visible but only because the screen was not updated in position
===

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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/10 272,820,424 (increasing)
Earth Distance 2023/05/09 271,651,555 (increasing)
Earth Distance 2023/05/08 270,306,666 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 15 and 16 minutes. Communications delay would be 30+ 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 131 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 131 is Thursday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-11 06:13:37

===
Today on Mars: 0037/05/20 Friday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/11 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 062.3 Sol Number: 132 Change in degrees is +.4 Julian date is: J0037132
Solar Longitude: 061.9 Sol Number: 131 Change in degrees is +.5 Julian date is: J0037131
Solar Longitude: 061.4 Sol Number: 130 Change in degrees is +.4 Julian date is: J0037130
===

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: 248,942,135 km [22.0 km/s] Difference is +29495 <= 1229 km/hour at 08.0 on 05/11 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,912,640 km [22.0 km/s] Difference is +30976 <= 1291 km/hour at 08.0 on 05/10 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,881,664 km [22.0 km/s] Difference is +32443 <= 1352 km/hour at 08.0 on 05/09 (time 8:00) (24 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 in path at far left on Day 0 PGC 1675510 below TYC 1912-2099-1 -
Day 0: PGC 1677835 – Day 1 just past 11 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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/11 274,150,819 (increasing)
Earth Distance 2023/05/10 272,820,424 (increasing)
Earth Distance 2023/05/09 271,651,555 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 15 and 16 minutes. Communications delay would be 30+ 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 132 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 132 is Friday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-12 06:12:12

===
Today on Mars: 0037/05/21 Saturday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/12 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 062.7 Sol Number: 133 Change in degrees is +.4 Julian date is: J0037133
Solar Longitude: 062.3 Sol Number: 132 Change in degrees is +.4 Julian date is: J0037132
Solar Longitude: 061.9 Sol Number: 131 Change in degrees is +.5 Julian date is: J0037131
===

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: 248,970,186 km [22.0 km/s] Difference is +28051 <= 1169 km/hour at 08.0 on 05/12 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,942,135 km [22.0 km/s] Difference is +29495 <= 1229 km/hour at 08.0 on 05/11 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,912,640 km [22.0 km/s] Difference is +30976 <= 1291 km/hour at 08.0 on 05/10 (time 8:00) (24 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: Three stars just below path TYC 1925-939/243/903 Day 0 at far left
Day 0 PGC 1675510 below TYC 1912-2099-1 – Day 1 right at 5.5 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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/12 275,354,888 (increasing)
Earth Distance 2023/05/11 274,150,819 (increasing)
Earth Distance 2023/05/10 272,820,424 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 15 and 16 minutes. Communications delay would be 30+ 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 133 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 133 is Saturday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-13 06:03:00

===
Today on Mars: 0037/05/22 Sunday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/13 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 063.2 Sol Number: 134 Change in degrees is +.5 Julian date is: J0037134
Solar Longitude: 062.7 Sol Number: 133 Change in degrees is +.4 Julian date is: J0037133
Solar Longitude: 062.3 Sol Number: 132 Change in degrees is +.4 Julian date is: J0037132
===

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: 248,996,723 km [22.0 km/s] Difference is +26537 <= 1106 km/hour at 08.0 on 05/13 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,970,186 km [22.0 km/s] Difference is +28051 <= 1169 km/hour at 08.0 on 05/12 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,942,135 km [22.0 km/s] Difference is +29495 <= 1229 km/hour at 08.0 on 05/11 (time 8:00) (24 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 1670404 Day 0 at left RA 07h 53m 54.3s
TYC 1925-939/243/903 Day 0 at far left Day 1 just below 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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/13 276,616,666 (increasing)
Earth Distance 2023/05/12 275,354,888 (increasing)
Earth Distance 2023/05/11 274,150,819 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 15 and 16 minutes. Communications delay would be 30+ 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 134 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 134 is Sunday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-14 06:22:20

===
Today on Mars: 0037/05/23 Monday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/14 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 063.6 Sol Number: 135 Change in degrees is +.4 Julian date is: J0037135
Solar Longitude: 063.2 Sol Number: 134 Change in degrees is +.5 Julian date is: J0037134
Solar Longitude: 062.7 Sol Number: 133 Change in degrees is +.4 Julian date is: J0037133
===

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: 249,021,764 km [22.0 km/s] Difference is +25041 <= 1043 km/hour at 08.0 on 05/14 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,996,723 km [22.0 km/s] Difference is +26537 <= 1106 km/hour at 08.0 on 05/13 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,970,186 km [22.0 km/s] Difference is +28051 <= 1169 km/hour at 08.0 on 05/12 (time 8:00) (24 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 above path PGC 2283 Mg 15.70 at far left on Day 0
Galaxy below path PGC 1670404 Day 0 at left RA 07h 53m 54.3s – Day 1 past Mars below 5.5 marker
TYC 1925-939/243/903 Day 0 at far left Day 1 just below Mars - Day 2 still visible at far right
===

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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/14 277,958,888 (increasing)
Earth Distance 2023/05/13 276,616,666 (increasing)
Earth Distance 2023/05/12 275,354,888 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 15 and 16 minutes. Communications delay would be 30+ 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 135 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 135 is Monday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-15 06:09:33

===
Today on Mars: 0037/05/24 Tuesday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/15 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 064.1 Sol Number: 136 Change in degrees is +.5 Julian date is: J0037136
Solar Longitude: 063.6 Sol Number: 135 Change in degrees is +.4 Julian date is: J0037135
Solar Longitude: 063.2 Sol Number: 134 Change in degrees is +.5 Julian date is: J0037134
===

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: 249,045,346 km [22.0 km/s] Difference is +23582 <= 0983 km/hour at 08.0 on 05/15 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,021,764 km [22.0 km/s] Difference is +25041 <= 1043 km/hour at 08.0 on 05/14 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 248,996,723 km [22.0 km/s] Difference is +26537 <= 1106 km/hour at 08.0 on 05/13 (time 8:00) (24 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: Cluster of stars above path: TYC 1375-532/252/278/380 at far left on Day 0
PGC 2283 Mg 15.70 at far left on Day 0 – Day 1 above Mars and just ahead – Possible for Day 2
===

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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/15 279,244,444 (increasing)
Earth Distance 2023/05/14 277,958,888 (increasing)
Earth Distance 2023/05/13 276,616,666 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 15 and 16 minutes. Communications delay would be 30+ 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 136 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 136 is Tuesday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

Mars_B4_Moon · 2023-05-15 10:35:04

The subject of days and festivals and marking historical events and weeks and time has come up again across the forum these past months

EDIT having trouble posting

I will refer to an old post by Void and make a general Solar system 'Timekeeping' post here, I might come back later to the post and maybe use some title in a future thread topic.

in a previous newmars Void refers to 'Laplace Resonance'
https://newmars.com/forums/viewtopic.php?id=8226

Io, Europa, and Ganymede created their own type of three-body orbital resonance called Laplace Resonance, coined by Pierre-Simon Laplace who discovered the equilibrium of their motion. Laplace was also known as the “French Newton” due to his contributions to the understanding of planetary motion and physics, amongst other big-brain findings.
https://jakobsauppe.com/infinityboundbl … -resonance

The amazing part is that this system is completely self-sustaining and orderly, producing an almost clock-like structure to its movement—particularly between Io and Ganymede. Io divides time into smaller increment with its period lasting about 1.77 Earth days per orbit around Jupiter, and Ganymede divides time into longer increments with an orbital period of roughly four times Io’s, or 7.1 Earth days.
Quote -
Who knew outer space could be so routine, right?
But Io-Europa-Ganymede isn’t the only Laplace example out there.

A clock on Jupiter might one day to apply to Exoplanets?

'Gleise 876, featuring its four planets. The outer three exhibit Laplace Resonance just like Io-Europa-Ganymede.'
https://jakobsauppe.com/infinityboundbl … -resonance

Animation of the 1:2:4 Laplace resonance between Ganymede, Europa, and Io. The labels indicate the ratios of orbital periods: Europa's is twice Io's, and Ganymede's is four times Io's.
https://www.planetary.org/space-images/ … lean-moons

Quote

It would be very desirable to have all four worlds operating according to circads of approximately the same duration, since one can easily envision a great deal of commerce between these worlds that are never separated by more than three million kilometers. Travelers between the Galilean planets could readily adjust to circads differing in duration by only a few minutes, but a variance of several hours between circads is sure to induce the ultimate in biorhythmic desynchronization; the "jet lag" we are familiar with on Earth would be minor by comparison.

Circads of the Galileans
Planet

Hours Per
Local Solar Day

Circads Per
Local Solar Day
Io - 2
Europa - 4
Ganymede - 8
VCallisto 19

Hours Per
Circad
Io
42.47665

21.23833
Europa
85.29825

21.32456
Ganymede
171.99327

21.49916
Callisto
402.08515

21.16238

While dividing the Ganymedean day by seven would result in a circad of 25.13 hours, a period much closer to the terrestrial solar day, the circads of Io and Europa just derived have already established the precedent of a shorter period for governing human events on two of the four the Galilean worlds.

2.0 THE CALENDARS OF JUPITER
http://ops-alaska.com/time/gangale_jupiter/jupiter.htm

3.0 THE DARIAN CALENDAR FOR TITAN
http://ops-alaska.com/time/gangale_satu … n_main.htm

The obvious solution is to divide the Titanian solar day into 16 circads. Each circad would therefore be 23 hours, 57 minutes, 13.11 seconds, or 0.998068439 days, hardly distinguishable from either the terrestrial day or the Martian sol.
As with the Galileans, the weekly calendar cycle must be considered in terms of the astronomical cycles of Titan. Titan makes one revolution of Saturn in 16 circads, but this is more than twice as long as the weeks on the Gregorian and Darian calendars, so it is more reasonable to define the Titanian week as half of a solar day, or eight circads. The eight-circad week also has its precedent on the Galilean calendars.
4.0 MONTHS AND YEARS
Since the purpose here is to construct a Darian calendar for Titan, the calendar year must be set to the Martian vernal equinox year of 686.9711 terrestrial solar days. The number of circads in the Martian vernal equinox year is:
686.9711 (d/YMve) * 16 (cT/rT) / 15.969095 (d/rT) = 688.3006 (cT/YMve)
Dividing the year into 24 months:
688.3006 (cT/YMve) / 24 (M/YMve) = 28.6792 (cT/M)
This is not much of a surprise, since on Mars the average month is 27.8579 sols, and the Martian sol is only 2.95 percent longer that the Titanian circad. What this means, however, is that whereas the number 32 very conveniently fit into a Martian year divided into 24 months for the Darian Galilean calendars, this same multiple of eight will not work as well for Titanian months, even though eight is the number of circads in a Titanian week.
As a result, were one to insist on an integral number of weeks in the months, a 688-circad year would contain fourteen 32-circad months and ten 24-circad months. It would be far more convenient to have months that did not vary so often and by so many circads. Since the average number of sols in a Martian month is nearly 28, the average number of circads in a Titanian month is not much more than that, and since 28 is divisible by four, weeks could be evenly bisected between months. As Table 3-1 shows, this results in a much more even arrangement of the months. All but four of the months would contain 28 circads. These are placed as the third month of each quarter, making the calendar year symmetrical.

Asteroids of the Alinda family are in or close to the 3:1 resonance. The orbital resonance of Jupiter and Moons in Celestial Mechanics occurs when orbiting bodies exert regular, periodic gravitational influence on each other, usually because their orbital periods are related by a ratio of small integers. In the rings of Saturn, the Encke and Keeler gaps within the 'A' Ring are cleared by 1:1 resonances with the embedded moonlets Pan and Daphnis, respectively. Sol is a solar day on Mars; that is, a Mars-day. A sol is the apparent interval between two successive returns of the Sun to the same meridian sundial time seen by an observer on Mars and one of several units for timekeeping on Mars.
Europa orbits Jupiter every 3.5 days and is locked by gravity to Jupiter, so the same hemisphere of the moon always faces the planet. Jupiter takes about 4333 Earth days or about 12 Earth years to orbit the Sun a Jovian year.
The Mars system 1:4 Deimos–Phobos while Neptune's innermost moon, Naiad, is in a 73:69 fourth-order resonance with the next outward moon, Thalassa. As it orbits Neptune,
the more inclined Naiad successively passes Thalassa twice from above and then twice from below, in a cycle that repeats every ~21.5 Earth days, Haumea's presumed 7:12 resonance with Neptune in a rotating frame, The A Ring's outer edge is maintained by a destabilizing 7:6 resonance with the moon Janus, there is a motion resonance of 3:4 Hyperion–Titan Saturn's moons, 1:2:4 Ganymede–Europa–Io Jupiter's moons, ratio of orbits.

Void suggest people might one day live on Callisto saying it is far away from radiation and the best distribution of chemicals to support a starter civilization.

Last edited by Mars_B4_Moon (2023-05-15 10:54:05)

tahanson43206 · 2023-05-16 06:05:53

===
Today on Mars: 0037/05/25 Wednesday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/16 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 064.5 Sol Number: 137 Change in degrees is +.4 Julian date is: J0037137
Solar Longitude: 064.1 Sol Number: 136 Change in degrees is +.5 Julian date is: J0037136
Solar Longitude: 063.6 Sol Number: 135 Change in degrees is +.4 Julian date is: J0037135
===

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: 249,067,449 km [22.0 km/s] Difference is +22103 <= 0921 km/hour at 08.0 on 05/16 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,045,346 km [22.0 km/s] Difference is +23582 <= 0983 km/hour at 08.0 on 05/15 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,021,764 km [22.0 km/s] Difference is +25041 <= 1043 km/hour at 08.0 on 05/14 (time 8:00) (24 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 large visible from above galaxy above path NGC 2503 Mg 14.80 above 11 hours ahead marker on Day 0
TYC 1375-532/252/278/380 at far left on Day 0 – Day 1 above 11 hours past marker – probably last day for the cluster
PGC 2283 Mg 15.70 at far left on Day 0 – Day 1 above Mars and just ahead – Possible for Day 2 – Still visible on Day 2 at far right of view
===

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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/16 280,549,999 (increasing)
Earth Distance 2023/05/15 279,244,444 (increasing)
Earth Distance 2023/05/14 277,958,888 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 15 and 16 minutes. Communications delay would be 30+ 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 137 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 137 is Wednesday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-17 06:05:22

===
Today on Mars: 0037/05/26 Thursday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/17 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 064.9 Sol Number: 138 Change in degrees is +.4 Julian date is: J0037138
Solar Longitude: 064.5 Sol Number: 137 Change in degrees is +.4 Julian date is: J0037137
Solar Longitude: 064.1 Sol Number: 136 Change in degrees is +.5 Julian date is: J0037136
##

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: 249,088,071 km [22.0 km/s] Difference is +20622 <= 0859 km/hour at 08.0 on 05/17 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,067,449 km [22.0 km/s] Difference is +22103 <= 0921 km/hour at 08.0 on 05/16 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,045,346 km [22.0 km/s] Difference is +23582 <= 0983 km/hour at 08.0 on 05/15 (time 8:00) (24 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: at far left of view: Mini-Boomer HIP 39447 Mg 6.72 just above path Day 0
NGC 2503 Mg 14.80 above 11 hours ahead marker on Day 0 – Day 1 above 11 hours past marker – last day for 2503
#=

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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/17 281,719,999 (increasing)
Earth Distance 2023/05/16 280,549,999 (increasing)
Earth Distance 2023/05/15 279,244,444 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 15 and 16 minutes. Communications delay would be 30+ 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 138 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 138 is Thursday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-18 06:08:00

===
Today on Mars: 0037/05/27 Friday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/18 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 065.4 Sol Number: 139 Change in degrees is +.5 Julian date is: J0037139
Solar Longitude: 064.9 Sol Number: 138 Change in degrees is +.4 Julian date is: J0037138
Solar Longitude: 064.5 Sol Number: 137 Change in degrees is +.4 Julian date is: J0037137
##

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: 249,107,207 km [22.0 km/s] Difference is +19136 <= 0797 km/hour at 08.0 on 05/18 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,088,071 km [22.0 km/s] Difference is +20622 <= 0859 km/hour at 08.0 on 05/17 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,067,449 km [22.0 km/s] Difference is +22103 <= 0921 km/hour at 08.0 on 05/16 (time 8:00) (24 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.
Nest up: Star at far left above path: TYC 1388-883-1 Mg 11.26 RA 08h 05m 11.3s Day 0
HIP 39447 Mg 6.72 just above path Day 0 – Day 1 just past Mar – possibly good for another 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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/18 283,051,555 (increasing)
Earth Distance 2023/05/17 281,719,999 (increasing)
Earth Distance 2023/05/16 280,549,999 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 15 and 16 minutes. Communications delay would be 30+ 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 139 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 139 is Friday in the Proposed Business calendar for Mars. Sol 049 was a skip day on Earth. Year 37 Sol 86 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-19 06:07:07

===
Today on Mars: 0037/05/28 Saturday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))
One day note: Last day of Month 5
Today on Earth: 2023/05/19 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: 3 <<== The Astronomical month will increment when longitude reaches 60 degrees

===
Solar Longitude: 065.8 Sol Number: 140 Change in degrees is +.4 Julian date is: J0037140
Solar Longitude: 065.4 Sol Number: 139 Change in degrees is +.5 Julian date is: J0037139
Solar Longitude: 064.9 Sol Number: 138 Change in degrees is +.4 Julian date is: J0037138
==#

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: 249,124,860 km [22.0 km/s] Difference is +17653 <= 0736 km/hour at 08.0 on 05/19 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,107,207 km [22.0 km/s] Difference is +19136 <= 0797 km/hour at 08.0 on 05/18 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,088,071 km [22.0 km/s] Difference is +20622 <= 0859 km/hour at 08.0 on 05/17 (time 8:00) (24 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 in path on far left Day 0 – TYC 1388-8-1 Mg 10.93 RA 08h 07m 40.6s
TYC 1388-883-1 Mg 11.26 RA 08h 05m 11.3s Day 0 – Day 1 above 11 hours past marker – last day for 883
HIP 39447 Mg 6.72 just above path Day 0 – Day 1 just past Mar – possibly good for another day – Day 2 still visible at far right – definitely 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 left at a slight downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

===
Earth Distance 2023/05/19 284,253,333 (increasing)
Earth Distance 2023/05/18 283,051,555 (increasing)
Earth Distance 2023/05/17 281,719,999 (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, 3:234, 14:252, 15:270, 16:288, 17:306
Light travel time today is between 15 and 16 minutes. Communications delay would be 30+ 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 140 is in Month 05 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 05 extends from Sol 113 through 140. 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 140 is Saturday in the Proposed Business calendar for Mars. Sol ??? was a skip day on Earth. Year 37 Sol ??? 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 April 30, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected June 6, 2023 (range 26th >> 28th) on Earth. The next re-alignment will occur near: June 6, 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 5 of 24 - Quarter 1 of 4 [Month 5-6] (This month has 28 Sols) << Proposed name: Aphelion

tahanson43206 · 2023-05-20 06:06:05

===
Today on Mars: 0037/06/01 Sunday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))
One day note: First day of Month 6 – Month 6 has 27 days. It marks the end of the First Quarter.
Today on Earth: 2023/05/20 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: 3 <<== The Astronomical month will increment when longitude reaches 90 degrees

===
Solar Longitude: 066.2 Sol Number: 141 Change in degrees is +.4 Julian date is: J0037141
Solar Longitude: 065.8 Sol Number: 140 Change in degrees is +.4 Julian date is: J0037140
Solar Longitude: 065.4 Sol Number: 139 Change in degrees is +.5 Julian date is: J0037139
==#

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: 249,141,029 km [22.0 km/s] Difference is +16169 <= 0674 km/hour at 08.0 on 05/20 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,124,860 km [22.0 km/s] Difference is +17653 <= 0736 km/hour at 08.0 on 05/19 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,107,207 km [22.0 km/s] Difference is +19136 <= 0797 km/hour at 08.0 on 05/18 (time 8:00) (24 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 below path at far left on Day 0 – TYC 1389-1868-1 Mg 1285 -
TYC 1388-8-1 Mg 10.93 RA 08h 07m 40.6s - Day 1 just past 11 hours past marker – last day for 1388-8-1
====#====#=