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

tahanson43206 · 2023-05-22 06:06:15

===
Today on Mars: 0037/06/03 Tuesday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/22 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 90 degrees

===
Solar Longitude: 067.1 Sol Number: 143 Change in degrees is +.4 Julian date is: J0037143
Solar Longitude: 066.7 Sol Number: 142 Change in degrees is +.5 Julian date is: J0037142
Solar Longitude: 066.2 Sol Number: 141 Change in degrees is +.4 Julian date is: J0037141
==#

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: 249,168,907 km [22.0 km/s] Difference is +13196 <= 0550 km/hour at 08.0 on 05/22 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,155,711 km [22.0 km/s] Difference is +14682 <= 0612 km/hour at 08.0 on 05/21 (time 8:00) (24 hours)
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)
====*===

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: Four stars and galaxy across path: PGC 1647792 RA 08h 15m 31.5s far left Day 0
PGC 1650870 between 11 and 5.5 markers on Day 0 – Day 1 Below 11 hour marker – last day for 870
====#====#=

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 2023/05/22 288,132,222 (increasing)
Earth Distance 2023/05/21 287,071,111 (increasing)
Earth Distance 2023/05/19 284,253,333 (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 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 143 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 143 is Tuesday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 · 2023-05-23 06:15:49

===
Today on Mars: 0037/06/04 Wednesday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/23 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 90 degrees

===
Solar Longitude: 067.5 Sol Number: 144 Change in degrees is +.4 Julian date is: J0037144
Solar Longitude: 067.1 Sol Number: 143 Change in degrees is +.4 Julian date is: J0037143
Solar Longitude: 066.7 Sol Number: 142 Change in degrees is +.5 Julian date is: J0037142
==#

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: 249,180,618 km [22.0 km/s] Difference is +11711 <= 0488 km/hour at 08.0 on 05/23 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,168,907 km [22.0 km/s] Difference is +13196 <= 0550 km/hour at 08.0 on 05/22 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,155,711 km [22.0 km/s] Difference is +14682 <= 0612 km/hour at 08.0 on 05/21 (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: Micro-Boomer below path HIP 40650 Mg 8.48 surrounded by galaxies – Far left on Day 0
PGC 1647792 RA 08h 15m 31.5s far left Day 0 – Day 1 below 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 2023/05/23 289,322,333 (increasing)
Earth Distance 2023/05/22 288,132,222 (increasing)
Earth Distance 2023/05/21 287,071,111 (increasing)
#=

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

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers.
Estimated light times: 1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162, 10:180, 11:198,12:216, 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 144 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 144 is Wednesday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 · 2023-05-24 06:33:39

===
Today on Mars: 0037/06/05 Thursday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/24 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 90 degrees

===
Solar Longitude: 068.0 Sol Number: 145 Change in degrees is +.5 Julian date is: J0037145
Solar Longitude: 067.5 Sol Number: 144 Change in degrees is +.4 Julian date is: J0037144
Solar Longitude: 067.1 Sol Number: 143 Change in degrees is +.4 Julian date is: J0037143
==#

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: 249,190,840 km [22.0 km/s] Difference is +10222 <= 0426 km/hour at 08.0 on 05/24 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,168,907 km [22.0 km/s] Difference is +13196 <= 0550 km/hour at 08.0 on 05/22 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,155,711 km [22.0 km/s] Difference is +14682 <= 0612 km/hour at 08.0 on 05/21 (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: another micro-boomer above path and ahead of 11 hour marker on Day 0 HIP 40781 Mg 7.88 -
Next up: Note visible galaxies across path: UGC 4329 Mg15.60 and PGC 23308 Mg15.60 ahead of 5.5 marker on Day 0
HIP 40650 Mg 8.48 surrounded by galaxies – Far left on Day 0 – Day 1 below and just past Mars – might be visible one more 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 2023/05/24 290,332,333 (increasing)
Earth Distance 2023/05/23 289,322,333 (increasing)
Earth Distance 2023/05/22 288,132,222 (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, 17:306,18:324
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 145 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 145 is Thursday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-05-25 06:11:33

===
Today on Mars: 0037/06/06 Friday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/25 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 90 degrees

===
Solar Longitude: 068.4 Sol Number: 146 Change in degrees is +.4 Julian date is: J0037146
Solar Longitude: 068.0 Sol Number: 145 Change in degrees is +.5 Julian date is: J0037145
Solar Longitude: 067.5 Sol Number: 144 Change in degrees is +.4 Julian date is: J0037144
==#

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: 249,199,580 km [22.0 km/s] Difference is +08740 <= 0364 km/hour at 08.0 on 05/25 (time 8:01) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,190,840 km [22.0 km/s] Difference is +10222 <= 0426 km/hour at 08.0 on 05/24 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,168,907 km [22.0 km/s] Difference is +13196 <= 0550 km/hour at 08.0 on 05/22 (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: PGC 142936 RA 08h 22m 20.8s at far left on Day 0
ahead of 11 hour marker on Day 0 HIP 40781 Mg 7.88 – Day 1 past 11 hour marker
UGC 4329 Mg15.60 and PGC 23308 Mg15.60 ahead of 5.5 marker on Day 0 – Day 1 well past 11 hour marker
====#====#=

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

Note: The curve of the path of Mars as seen against the background of stars is now a line heading 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 2023/05/25 291,740,000 (increasing)
Earth Distance 2023/05/24 290,332,333 (increasing)
Earth Distance 2023/05/23 289,322,333 (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, 17:306,18:324
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 146 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 146 is Friday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-05-26 06:11:33

===
Today on Mars: 0037/06/07 Saturday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/26 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 90 degrees

===
Solar Longitude: 068.9 Sol Number: 147 Change in degrees is +.5 Julian date is: J0037147
Solar Longitude: 068.4 Sol Number: 146 Change in degrees is +.4 Julian date is: J0037146
Solar Longitude: 068.0 Sol Number: 145 Change in degrees is +.5 Julian date is: J0037145
==#

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: 249,206,821 km [22.0 km/s] Difference is +07241 <= 0302 km/hour at 08.0 on 05/26 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,199,580 km [22.0 km/s] Difference is +08740 <= 0364 km/hour at 08.0 on 05/25 (time 8:01) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,190,840 km [22.0 km/s] Difference is +10222 <= 0426 km/hour at 08.0 on 05/24 (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 at far left and above path: PGC 142940 and 1640339 RA 08h 24m 51.9s
PGC 142936 RA 08h 22m 20.8s at far left on Day 0 – 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 2023/05/25 292,753,999 (increasing)
Earth Distance 2023/05/25 291,740,000 (increasing)
Earth Distance 2023/05/24 290,332,333 (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, 17:306,18:324
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 147 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 147 is Saturday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-05-27 06:07:15

===
Today on Mars: 0037/06/08 Sunday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/27 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: 069.3 Sol Number: 148 Change in degrees is +.4 Julian date is: J0037148
Solar Longitude: 068.9 Sol Number: 147 Change in degrees is +.5 Julian date is: J0037147
Solar Longitude: 068.4 Sol Number: 146 Change in degrees is +.4 Julian date is: J0037146
==#

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: 249,212,579 km [22.0 km/s] Difference is +05758 <= 0240 km/hour at 08.0 on 05/27 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,206,821 km [22.0 km/s] Difference is +07241 <= 0302 km/hour at 08.0 on 05/26 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,199,580 km [22.0 km/s] Difference is +08740 <= 0364 km/hour at 08.0 on 05/25 (time 8:01) (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 stars and a galaxy across path at far left on Day 0: TYC 1391-116-1 high TYC 1391-98-1 low PGC 1632858 -
PGC 142940 and 1640339 RA 08h 24m 51.9s – Day 1 above 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 2023/05/27 294,016,333 (increasing)
Earth Distance 2023/05/26 292,753,999 (increasing)
Earth Distance 2023/05/25 291,740,000 (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, 17:306,18:324
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 148 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 148 is Sunday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 · 2023-05-28 06:22:05

===
Today on Mars: 0037/06/09 Monday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/28 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 90 degrees

===
Solar Longitude: 069.7 Sol Number: 149 Change in degrees is +.4 Julian date is: J0037149
Solar Longitude: 069.3 Sol Number: 148 Change in degrees is +.4 Julian date is: J0037148
Solar Longitude: 068.9 Sol Number: 147 Change in degrees is +.5 Julian date is: J0037147
==#

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: 249,216,848 km [22.0 km/s] Difference is +04269 <= 0178 km/hour at 08.0 on 05/28 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,212,579 km [22.0 km/s] Difference is +05758 <= 0240 km/hour at 08.0 on 05/27 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,206,821 km [22.0 km/s] Difference is +07241 <= 0302 km/hour at 08.0 on 05/26 (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 on Day 0 TYC 1387-599-1 Mg 11.47 RA 08h 30m 10.3s
at far left on Day 0: TYC 1391-116-1 high TYC 1391-98-1 low PGC 1632858 - - Day 1 just past Mars – Might have one day left
PGC 142940 and 1640339 RA 08h 24m 51.9s – Day 1 above 5.5 hours past marker – likely last day for these two – Still there 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 2023/05/28 295,126,982 (increasing)
Earth Distance 2023/05/27 294,016,333 (increasing)
Earth Distance 2023/05/26 292,753,999 (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, 17:306,18:324
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 149 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 149 is Monday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-05-29 06:01:39

===
Today on Mars: 0037/06/10 Tuesday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/29 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 90 degrees

===
Solar Longitude: 070.2 Sol Number: 150 Change in degrees is +.5 Julian date is: J0037150
Solar Longitude: 069.7 Sol Number: 149 Change in degrees is +.4 Julian date is: J0037149
Solar Longitude: 069.3 Sol Number: 148 Change in degrees is +.4 Julian date is: J0037148
==#

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: 249,219,628 km [22.0 km/s] Difference is +02780 <= 0116 km/hour at 08.0 on 05/29 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,212,579 km [22.0 km/s] Difference is +05758 <= 0240 km/hour at 08.0 on 05/28 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,206,821 km [22.0 km/s] Difference is +07241 <= 0302 km/hour at 08.0 on 05/27 (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: Boomer! HIP 41909 Mg 5.21 above path and at far left on Day 0
Day 0 TYC 1387-599-1 Mg 11.47 RA 08h 30m 10.3s - Day 1 just past Mars
Day 0: TYC 1391-116-1 high TYC 1391-98-1 low PGC 1632858 - - Day 1 just past Mars – Might have one day left – Day 2 just 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 2023/05/29 296,409,999 (increasing)
Earth Distance 2023/05/28 295,126,982 (increasing)
Earth Distance 2023/05/27 294,016,333 (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, 17:306,18:324
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 150 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 150 is Tuesday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-05-30 06:29:40

===
Today on Mars: 0037/06/11 Wednesday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/05/30 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 90 degrees

===
Solar Longitude: 070.6 Sol Number: 151 Change in degrees is +.4 Julian date is: J0037151
Solar Longitude: 070.2 Sol Number: 150 Change in degrees is +.5 Julian date is: J0037150
Solar Longitude: 069.7 Sol Number: 149 Change in degrees is +.4 Julian date is: J0037149
==#

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: 249,220,919 km [22.0 km/s] Difference is +01292 <= 0054 km/hour at 08.0 on 05/30 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,219,628 km [22.0 km/s] Difference is +02780 <= 0116 km/hour at 08.0 on 05/29 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,212,579 km [22.0 km/s] Difference is +05758 <= 0240 km/hour at 08.0 on 05/28 (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 below path at far left: TYC 1398-335-1 Mg 10.43 RA 08h 33m 42.3s Day 0
Boomer! HIP 41909 Mg 5.21 above path and at far left on Day 0 – Day 1 standing just above Mars
Day 0 TYC 1387-599-1 Mg 11.47 RA 08h 30m 10.3s - Day 1 just past Mars - Day 2 – Still there but definitely last day for 599
====#====#=

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 2023/05/30 297,678,888 (increasing)
Earth Distance 2023/05/29 296,409,999 (increasing)
Earth Distance 2023/05/28 295,126,982 (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, 17:306,18:324,19:342
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 151 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 151 is Wednesday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-05-31 12:04:53

===
Today on Mars: 0037/06/12 Thursday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))
One day note: On this day, the rate of acceleration of Mars after it's most recent perihelion dropped through zero.
Today on Earth: 2023/05/31 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 90 degrees

===
Solar Longitude: 071.0 Sol Number: 152 Change in degrees is +.4 Julian date is: J0037152
Solar Longitude: 070.6 Sol Number: 151 Change in degrees is +.4 Julian date is: J0037151
Solar Longitude: 070.2 Sol Number: 150 Change in degrees is +.5 Julian date is: J0037150
==#

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: 249,220,721 km [22.0 km/s] Difference is -198 <= -8.25 km/hour at 08.0 on 05/31 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,220,919 km [22.0 km/s] Difference is +01292 <= 0054 km/hour at 08.0 on 05/30 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,219,628 km [22.0 km/s] Difference is +02780 <= 0116 km/hour at 08.0 on 05/29 (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 trio across path inside 11 hours ahead marker on Day 0 TYC 1398-218/250/146 -
TYC 1398-335-1 Mg 10.43 RA 08h 33m 42.3s Day 0 – Day 1 past 11 hours past marker
Boomer! HIP 41909 Mg 5.21 above path and at far left on Day 0 – Day 1 standing just above Mars - Still there on Day 2 but just barely
====#====#=

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 2023/05/31 298,898,999 (increasing)
Earth Distance 2023/05/30 297,678,888 (increasing)
Earth Distance 2023/05/29 296,409,999 (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, 17:306,18:324,19:342
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 152 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 152 is Thursday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-06-01 06:52:05

Apache is grumpy today .... I'll split today's calendar update

===
Today on Mars: 0037/06/13 Friday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))
One day note: Mars passed through Aphelion on May 30th, 2023 (Earth Calendar) The planet is now travelling as slowly as it can along it's orbit.
Today on Earth: 2023/06/01 Thursday (Earth Date) Post Title: Today on Mars [Perihelion occurred June 20, 2022 Earth Calendar]
====*=

tahanson43206 · 2023-06-01 14:24:28

Try two

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: 071.5 Sol Number: 153 Change in degrees is +.5 Julian date is: J0037153
Solar Longitude: 071.0 Sol Number: 152 Change in degrees is +.4 Julian date is: J0037152
Solar Longitude: 070.6 Sol Number: 151 Change in degrees is +.4 Julian date is: J0037151
==#

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)
Aphelion occurred May 30, 2023 Earth Calendar. Longitude was 70.6. Sol was 151.

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.

tahanson43206 · 2023-06-01 14:26:38

try 3

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.

tahanson43206 · 2023-06-01 14:27:24

try 4

===
Distance: Mars >> Sun per theskylive.com: 249,219,032 km [22.0 km/s] Difference is -1689 <= -70.375 km/hour at 08.0 on 06/01 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,220,721 km [22.0 km/s] Difference is -198 <= -8.25 km/hour at 08.0 on 05/31 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,220,919 km [22.0 km/s] Difference is +01292 <= 0054 km/hour at 08.0 on 05/30 (time 8:00) (24 hours)
====*===

tahanson43206 · 2023-06-01 14:28:36

try 5

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.

tahanson43206 · 2023-06-01 14:30:13

try 6

Calling it a day

tahanson43206 · 2023-06-02 06:07:21

Place holder for today's Calendar update
249,215,850 km [22.0 km/s]
Mars ** just ** passed aphelion ... Sun distance is now decreasing, and that will continue for the next Earth year.
Today's decrease is -3182 kilometers

tahanson43206 · 2023-06-02 07:26:11

===
Today on Mars: 0037/06/14 Saturday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/06/02 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 90 degrees

===
Solar Longitude: 071.9 Sol Number: 154 Change in degrees is +.4 Julian date is: J0037154
Solar Longitude: 071.5 Sol Number: 153 Change in degrees is +.5 Julian date is: J0037153
Solar Longitude: 071.0 Sol Number: 152 Change in degrees is +.4 Julian date is: J0037152
==#

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: 249,215,850 km [22.0 km/s] Difference is -3182 <= -133 km/hour at 08.0 on 06/02 (time 8:03) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,219,032 km [22.0 km/s] Difference is -1689 <= -70.375 km/hour at 08.0 on 06/01 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,220,721 km [22.0 km/s] Difference is -198 <= -8.25 km/hour at 08.0 on 05/31 (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: micro-Boomer HIP 42673 Mg 6.82 RA 08h 41m 50.1s Day 0 at far left above path
====#====#=

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 2023/06/02 300.984,380 (increasing)
Earth Distance 2023/05/31 298,898,999 (increasing)
Earth Distance 2023/05/30 297,678,888 (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, 17:306,18:324,19:342
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 154 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 154 is Saturday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-06-03 06:07:59

===
Today on Mars: 0037/06/15 Sunday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/06/03 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: 072.3 Sol Number: 155 Change in degrees is +.4 Julian date is: J0037155
Solar Longitude: 071.9 Sol Number: 154 Change in degrees is +.4 Julian date is: J0037154
Solar Longitude: 071.5 Sol Number: 153 Change in degrees is +.5 Julian date is: J0037153
==#

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: 249,211,193 km [22.0 km/s] Difference is -4657 <= -194 km/hour at 08.0 on 06/03 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,215,850 km [22.0 km/s] Difference is -3182 <= -133 km/hour at 08.0 on 06/02 (time 8:03) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,219,032 km [22.0 km/s] Difference is -1689 <= -70.375 km/hour at 08.0 on 06/01 (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: Trio across path at far left on Day 0 TYC 1396-21-1 (76&6) RA 08h 43m 20.2s -
HIP 42673 Mg 6.82 RA 08h 41m 50.1s Day 0 at far left above path – Day 1 above 5.5 hours past marker – Might be their tomorrow
====*====*=

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 2023/06/03 302,228,999 (increasing)
Earth Distance 2023/06/02 300.984,380 (increasing)
Earth Distance 2023/05/31 298,898,999 (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, 17:306,18:324,19:342
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 155 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 155 is Sunday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-06-04 06:06:26

===
Today on Mars: 0037/06/16 Monday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/06/04 Sunday (Earth Date) Post Title: Today on Mars [Perihelion occurred June 20, 2022 Earth Calendar]
====*=

Per http://www-mars.lmd.jussieu.fr/mars/tim … _time.html also see: in-the-sky.org for 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: 071.8 Sol Number: 156 Change in degrees is +.5 Julian date is: J0037156
Solar Longitude: 071.3 Sol Number: 155 Change in degrees is +.4 Julian date is: J0037155
Solar Longitude: 070.9 Sol Number: 154 Change in degrees is +.4 Julian date is: J0037154
==#

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: 249,205,040 km [22.0 km/s] Difference is -6153 <= -256 km/hour at 08.0 on 06/04 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,211,193 km [22.0 km/s] Difference is -4657 <= -194 km/hour at 08.0 on 06/03 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,215,850 km [22.0 km/s] Difference is -3182 <= -133 km/hour at 08.0 on 06/02 (time 8:03) (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: Quad across path Day 0 ahead of 11 hour marker PGC 1595262 TYC 1396-1226-1 TYC 1396-1426-1 PGC 24638 -
Day 0 TYC 1396-21-1 (76&6) RA 08h 43m 20.2s – Day 1 at far right and just barely visible
====*====*=

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 2023/06/04 303,659,666 (increasing)
Earth Distance 2023/06/03 302,228,999 (increasing)
Earth Distance 2023/06/02 300.984,380 (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, 17:306,18:324,19:342
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 156 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 156 is Monday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-06-05 06:25:00

===
Today on Mars: 0037/06/17 Tuesday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/06/05 Monday (Earth Date) Post Title: Today on Mars [Aphelion occurred May 30, 2023 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: 073.2 Sol Number: 157 Change in degrees is +.4 Julian date is: J0037157
Solar Longitude: 072.8 Sol Number: 156 Change in degrees is +.5 Julian date is: J0037156
Solar Longitude: 072.3 Sol Number: 155 Change in degrees is +.4 Julian date is: J0037155
==#

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: 249,197,399 km [22.0 km/s] Difference is -7641 <= -318 km/hour at 08.0 on 06/05 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,205,040 km [22.0 km/s] Difference is -6153 <= -256 km/hour at 08.0 on 06/04 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,211,193 km [22.0 km/s] Difference is -4657 <= -194 km/hour at 08.0 on 06/03 (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: Galaxy below path PGC 1564638 RA 08h 48m 26.6s Day 0 ahead of 11 hour marker
Day 0 ahead of 11 hour marker PGC 1595262 TYC 1396-1226-1 TYC 1396-1426-1 PGC 24638 – Day 1 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 2023/06/05 304,610,000 (increasing)
Earth Distance 2023/06/04 303,659,666 (increasing)
Earth Distance 2023/06/03 302,228,999 (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, 17:306,18:324,19:342
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 157 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 157 is Tuesday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-06-06 06:07:14

===
Today on Mars: 0037/06/18 Wednesday <<-- Days of the week offset 6 with Earth. (count from Mars to Earth (updated 2023/04/30))

Today on Earth: 2023/06/06 Tuesday (Earth Date) Post Title: Today on Mars [Aphelion occurred May 30, 2023 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: 073.7 Sol Number: 158 Change in degrees is +.5 Julian date is: J0037158
Solar Longitude: 073.2 Sol Number: 157 Change in degrees is +.4 Julian date is: J0037157
Solar Longitude: 072.8 Sol Number: 156 Change in degrees is +.5 Julian date is: J0037156
==#

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: 249,188,269 km [22.0 km/s] Difference is -9130 <= -380 km/hour at 08.0 on 06/06 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,197,399 km [22.0 km/s] Difference is -7641 <= -318 km/hour at 08.0 on 06/05 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,205,040 km [22.0 km/s] Difference is -6153 <= -256 km/hour at 08.0 on 06/04 (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: Star below path and ahead of 11 hour marker on Day 0 – TYC 1396-1319-1 RA 08h 50m 36.6s
PGC 1564638 RA 08h 48m 26.6s Day 0 ahead of 11 hour marker – Day 1 past 5.5 hours past marker – probably last day for 638
Day 0 ahead of 11 hour marker PGC 1595262 TYC 1396-1226-1 TYC 1396-1426-1 PGC 24638 – Day 1 at 5.5 hours past marker – Day 2 at edge
====*====*=

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 2023/06/06 305,681,578 (increasing)
Earth Distance 2023/06/05 304,610,000 (increasing)
Earth Distance 2023/06/04 303,659,666 (increasing)
#===

Mars and Earth are moving apart after Opposition.
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, 17:306,18:324,19:342
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 158 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 158 is Wednesday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-06-07 07:10:44

===
Today on Mars: 0037/06/18 Wednesday <<-- Days of the week offset 0 with Earth. (count from Mars to Earth (updated 2023/06/07))
One day note: Today is skip day on Mars. The next skip day will be on or near July 13, 2023 on Earth. SearchTerm:Alignment-Offset-Zero
Today on Earth: 2023/06/07 Wednesday (Earth Date) Post Title: Today on Mars [Aphelion occurred May 30, 2023 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: 074.1 Sol Number: 158 Change in degrees is +.4 Julian date is: J0037158 << Skip day
Solar Longitude: 073.7 Sol Number: 158 Change in degrees is +.5 Julian date is: J0037158
Solar Longitude: 073.2 Sol Number: 157 Change in degrees is +.4 Julian date is: J0037157
==#

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: 249,177,653 km [22.0 km/s] Difference is -10616 <= -442 km/hour at 08.0 on 06/07 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,188,269 km [22.0 km/s] Difference is -09130 <= -380 km/hour at 08.0 on 06/06 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,197,399 km [22.0 km/s] Difference is -07641 <= -318 km/hour at 08.0 on 06/05 (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: Star just above path and at far left on Day 0 – TYC 1397-61-1 RA 08h 53m 30.6s
Day 0 – TYC 1396-1319-1 RA 08h 50m 36.6s - Day 1 below 11 hours past marker – last day for 1319
====*====*=

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 2023/06/07 306,734,444 (increasing)
Earth Distance 2023/06/06 305,681,578 (increasing)
Earth Distance 2023/06/05 304,610,000 (increasing)
#===

Mars and Earth are moving apart after Opposition.
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, 17:306,18:324,19:342
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 158 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 158 is Wednesday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 June 7, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected July 13, 2023 (range 26th >> 28th) on Earth. The week days are in alignment until July 13, 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-06-08 06:20:00

===
Today on Mars: 0037/06/19 Thursday <<-- Days of the week offset 0 with Earth. (count from Mars to Earth (updated 2023/06/07))

Today on Earth: 2023/06/08 Thursday (Earth Date) Post Title: Today on Mars [Aphelion occurred May 30, 2023 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: 074.5 Sol Number: 159 Change in degrees is +.4 Julian date is: J0037159
Solar Longitude: 074.1 Sol Number: 158 Change in degrees is +.4 Julian date is: J0037158 << Skip day
Solar Longitude: 073.7 Sol Number: 158 Change in degrees is +.5 Julian date is: J0037158
==#

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: 249,165,549 km [22.0 km/s] Difference is -12104 <= -504 km/hour at 08.0 on 06/08 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,177,653 km [22.0 km/s] Difference is -10616 <= -442 km/hour at 08.0 on 06/07 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,188,269 km [22.0 km/s] Difference is -09130 <= -380 km/hour at 08.0 on 06/06 (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: Star above 11 hours ahead marker on Day 0 – TYC 1397-1276-1 RA 08h 55m 17.1s
Day 0 – TYC 1397-61-1 RA 08h 53m 30.6s - Day 1 above 5.5 hours after marker – might be 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 2023/06/08 307,869,325 (increasing)
Earth Distance 2023/06/07 306,734,444 (increasing)
Earth Distance 2023/06/06 305,681,578 (increasing)
#===

Mars and Earth are moving apart after Opposition.
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, 17:306,18:324,19:342
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 159 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 159 is Thursday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 June 7, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected July 13, 2023 (range 26th >> 28th) on Earth. The week days are in alignment until July 13, 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

tahanson43206 · 2023-06-09 06:06:43

===
Today on Mars: 0037/06/20 Friday <<-- Days of the week offset 0 with Earth. (count from Mars to Earth (updated 2023/06/07))

Today on Earth: 2023/06/09 Friday (Earth Date) Post Title: Today on Mars [Aphelion occurred May 30, 2023 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: 075.0 Sol Number: 160 Change in degrees is +.5 Julian date is: J0037160
Solar Longitude: 074.5 Sol Number: 159 Change in degrees is +.4 Julian date is: J0037159
Solar Longitude: 074.1 Sol Number: 158 Change in degrees is +.4 Julian date is: J0037158 << Skip day
==#

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: 249,151,959 km [22.0 km/s] Difference is -13590 <= -566 km/hour at 08.0 on 06/09 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,165,549 km [22.0 km/s] Difference is -12104 <= -504 km/hour at 08.0 on 06/08 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com: 249,177,653 km [22.0 km/s] Difference is -10616 <= -442 km/hour at 08.0 on 06/07 (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 and Stars in path: PGC 1563779 TYC 1397-1872-1 RA 08h 58m 44.4s Day 0 at far left
TYC 1397-1276-1 RA 08h 55m 17.1s - Day 1 Above 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 2023/06/09 308,830,222 (increasing)
Earth Distance 2023/06/08 307,869,325 (increasing)
Earth Distance 2023/06/07 306,734,444 (increasing)
#===

Mars and Earth are moving apart after Opposition.
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, 17:306,18:324,19:342
Light travel time today is between 16 and 17 minutes. Communications delay would be 32+ 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 160 is in Month 06 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 06 extends from Sol 141 through 167. See post 82 of Holidays topic for current details. <<== There are 27 days in Month 06
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 160 is Friday in the Proposed Business calendar for Mars. Sol 121 was a skip day on Earth. Year 37 Sol 158 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 June 7, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected July 13, 2023 (range 26th >> 28th) on Earth. The week days are in alignment until July 13, 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 6 of 24 - Quarter 1 of 4 [Month 1-6] (This month has 27 Sols)

New Mars Forums

Announcement

#1826 2023-05-22 06:06:15

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

#1827 2023-05-23 06:15:49

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

#1828 2023-05-24 06:33:39

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

#1829 2023-05-25 06:11:33

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

#1830 2023-05-26 06:11:33

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

#1831 2023-05-27 06:07:15

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

#1832 2023-05-28 06:22:05

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

#1833 2023-05-29 06:01:39

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

#1834 2023-05-30 06:29:40

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

#1835 2023-05-31 12:04:53

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

#1836 2023-06-01 06:52:05

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

#1837 2023-06-01 14:24:28

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

#1838 2023-06-01 14:26:38

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

#1839 2023-06-01 14:27:24

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

#1840 2023-06-01 14:28:36

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

#1841 2023-06-01 14:30:13

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

#1842 2023-06-02 06:07:21

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

#1843 2023-06-02 07:26:11

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

#1844 2023-06-03 06:07:59

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

#1845 2023-06-04 06:06:26

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

#1846 2023-06-05 06:25:00

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

#1847 2023-06-06 06:07:14

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

#1848 2023-06-07 07:10:44

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

#1849 2023-06-08 06:20:00

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

#1850 2023-06-09 06:06:43

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

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