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#1926 2023-08-23 06:10:03

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/10 Tuesday <<-- Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/08/23 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 108.2 Sol Number: 233  Change in degrees is +.4 Julian date is: J0037233
Solar Longitude: 107.8 Sol Number: 232  Change in degrees is +.5 Julian date is: J0037232
Solar Longitude: 107.3 Sol Number: 231  Change in degrees is +.4 Julian date is: J0037231
==#

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:   244,038,684 km [22.5 km/s] Difference is -118297 <= -4929 km/hour at 08.0 on 08/23 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   244,156,981 km [22.5 km/s] Difference is -117010 <= -4875 km/hour at 08.0 on 08/22 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   244,273,991 km [22.5 km/s] Difference is -115748 <= -4823 km/hour at 08.0 on 08/21 (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 upper right to lower left in the view from Earth.
Next up: two galaxies across path: PC 1199172 and 1198250 at far left on Day 0 -
Note boomer just below Mars: HIP 57757 Mg 3.55 Day 0
PGC 1209728/1209509 RA 11h 49m 28.2s – ahead of 11 hour marker on Day 0 – Day 1 at far right of screen – 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 downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

Light travel time today is between 20 and 21 minutes. Communications delay would be 42+ minutes round trip.

===
Earth Distance 2023/08/23 368,446,088 (increasing)
Earth Distance 2023/08/22 367,949,999 (increasing)
Earth Distance 2023/08/21 367,487,777 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 233 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  08 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 233 is Tuesday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1927 2023-08-24 06:27:05

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/11 Wednesday <<-- Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/08/24 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 108.7 Sol Number: 234  Change in degrees is +.5 Julian date is: J0037234
Solar Longitude: 108.2 Sol Number: 233  Change in degrees is +.4 Julian date is: J0037233
Solar Longitude: 107.8 Sol Number: 232  Change in degrees is +.5 Julian date is: J0037232
==#

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:   243,919,144 km [22.5 km/s] Difference is -119540 <= -4980 km/hour at 08.0 on 08/24 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   244,038,684 km [22.5 km/s] Difference is -118297 <= -4929 km/hour at 08.0 on 08/23 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   244,156,981 km [22.5 km/s] Difference is -117010 <= -4875 km/hour at 08.0 on 08/22 (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 upper right to lower left in the view from Earth.
Next up: Micro-Boomer in path: HIP 58111 RA 11h 55m 03.9s at far left on Day 0 -
PC 1199172 and 1198250 at far left on Day 0 - - Day 1 just past Mars
Note boomer just below Mars: HIP 57757 Mg 3.55 Day 0 – Still visible in the upper right corner on Day 1
====*====*= 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 42+ minutes round trip.

===
Earth Distance 2023/08/24 368,948,222 (increasing)
Earth Distance 2023/08/23 368,446,088 (increasing)
Earth Distance 2023/08/22 367,949,999 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 234 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  08 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 234 is Wednesday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1928 2023-08-25 06:07:13

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/12 Thursday <<-- Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/08/25 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 109.1 Sol Number: 235  Change in degrees is +.4 Julian date is: J0037235
Solar Longitude: 108.7 Sol Number: 234  Change in degrees is +.5 Julian date is: J0037234
Solar Longitude: 108.2 Sol Number: 233  Change in degrees is +.4 Julian date is: J0037233
==#

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:   243,798,539 km [22.5 km/s] Difference is -120605 <= -5025 km/hour at 08.0 on 08/25 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,919,144 km [22.5 km/s] Difference is -119540 <= -4980 km/hour at 08.0 on 08/24 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   244,038,684 km [22.5 km/s] Difference is -118297 <= -4929 km/hour at 08.0 on 08/23 (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 upper right to lower left in the view from Earth.
Next up: A cluster of galaxies just above path: PGC 1185571 RA 11h 57m 42.9s Day 0 -
HIP 58111 RA 11h 55m 03.9s at far left on Day 0 – Day 1 just past Mars
PGC 1199172 and 1198250 at far left on Day 0 - - Day 1 just past Mars – Day 2 just visible at the 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 downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

Light travel time today is between 20 and 21 minutes. Communications delay would be 42+ minutes round trip.

===
Earth Distance 2023/08/25 369,382,222 (increasing)
Earth Distance 2023/08/24 368,948,222 (increasing)
Earth Distance 2023/08/23 368,446,088 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 235 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  08 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 235 is Thursday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1929 2023-08-26 06:31:04

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/13 Friday <<-- Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/08/26 Saturday (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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 109.6 Sol Number: 236  Change in degrees is +.5 Julian date is: J0037236
Solar Longitude: 109.1 Sol Number: 235  Change in degrees is +.4 Julian date is: J0037235
Solar Longitude: 108.7 Sol Number: 234  Change in degrees is +.5 Julian date is: J0037234
==#

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:   243,676,618 km [22.5 km/s] Difference is -121921 <= -5060 km/hour at 08.0 on 08/26 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,798,539 km [22.5 km/s] Difference is -120605 <= -5025 km/hour at 08.0 on 08/25 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,919,144 km [22.5 km/s] Difference is -119540 <= -4980 km/hour at 08.0 on 08/24 (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 upper right to lower left in the view from Earth.
Next up: Star at far left: TYC 273-398-1 RA 11h 59m 56.7s above path on Day 0 -
PGC 1185571 RA 11h 57m 42.9s Day 0 – Day 1 the entire group is just past Mars – 571 may be good for another day
HIP 58111 RA 11h 55m 03.9s at far left on Day 0 – Day 1 just past Mars  - Day 2 barely visible way in the upper right corner of the view
PGC 1199172 and 1198250 at far left on Day 0 - - Day 1 just past Mars – Day 2 just visible at the 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 downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

Light travel time today is between 20 and 21 minutes. Communications delay would be 42+ minutes round trip.

===
Earth Distance 2023/08/26 369,911,999 (increasing)
Earth Distance 2023/08/25 369,382,222 (increasing)
Earth Distance 2023/08/24 368,948,222 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 236 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 236 is Friday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1930 2023-08-27 06:11:46

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/14 Saturday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/08/27 Sunday (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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 110.0 Sol Number: 237  Change in degrees is +.4 Julian date is: J0037237
Solar Longitude: 109.6 Sol Number: 236  Change in degrees is +.5 Julian date is: J0037236
Solar Longitude: 109.1 Sol Number: 235  Change in degrees is +.4 Julian date is: J0037235
==#

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:   243,553,485 km [22.5 km/s] Difference is -123133 <= -5131 km/hour at 08.0 on 08/27 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,676,618 km [22.5 km/s] Difference is -121921 <= -5060 km/hour at 08.0 on 08/26 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,798,539 km [22.5 km/s] Difference is -120605 <= -5025 km/hour at 08.0 on 08/25 (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 upper right to lower left in the view from Earth.
Next up: Galaxy in path and ahead of 11 hour marker on Day 0 PGC 1171135 RA 12h 01m 06.7s -
TYC 273-398-1 RA 11h 59m 56.7s above path on Day 0 – Day 1 above Mars – 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 downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

Light travel time today is between 20 and 21 minutes. Communications delay would be 42+ minutes round trip.

===
Earth Distance 2023/08/27 370,252,176 (increasing)
Earth Distance 2023/08/26 369,911,999 (increasing)
Earth Distance 2023/08/25 369,382,222 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 237 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 237 is Saturday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1931 2023-08-28 06:05:18

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/15 Sunday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/08/28 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 110.5 Sol Number: 238  Change in degrees is +.5 Julian date is: J0037238
Solar Longitude: 110.0 Sol Number: 237  Change in degrees is +.4 Julian date is: J0037237
Solar Longitude: 109.6 Sol Number: 236  Change in degrees is +.5 Julian date is: J0037236
==#

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:   243,429,144 km [22.5 km/s] Difference is -124341 <= -5181 km/hour at 08.0 on 08/28 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,553,485 km [22.5 km/s] Difference is -123133 <= -5131 km/hour at 08.0 on 08/27 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,676,618 km [22.5 km/s] Difference is -121921 <= -5060 km/hour at 08.0 on 08/26 (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 upper right to lower left in the view from Earth.
Next up: Star just below path TYC 280-449-1 RA 12h 04m 41.5s at far left on Day0 -
Day 0 PGC 1171135 RA 12h 01m 06.7s – Day 1 right at 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 downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

Light travel time today is between 20 and 21 minutes. Communications delay would be 42+ minutes round trip.

===
Earth Distance 2023/08/28 370,689,555 (increasing)
Earth Distance 2023/08/27 370,252,176 (increasing)
Earth Distance 2023/08/26 369,911,999 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 238 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 238 is Sunday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1932 2023-08-29 06:14:36

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/16 Monday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/08/29 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 111.0 Sol Number: 239  Change in degrees is +.5 Julian date is: J0037239
Solar Longitude: 110.5 Sol Number: 238  Change in degrees is +.5 Julian date is: J0037238
Solar Longitude: 110.0 Sol Number: 237  Change in degrees is +.4 Julian date is: J0037237
==#

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:   243,303,605 km [22.6 km/s] Difference is -125539 <= -5231 km/hour at 08.0 on 08/29 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,429,144 km [22.5 km/s] Difference is -124341 <= -5181 km/hour at 08.0 on 08/28 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,553,485 km [22.5 km/s] Difference is -123133 <= -5131 km/hour at 08.0 on 08/27 (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 upper right to lower left in the view from Earth.
Next up: Star jus above path: TYC 280-736-1 RA 12h 05m 50.0s just ahead of 11 hour marker on Day 0 -
TYC 280-449-1 RA 12h 04m 41.5s at far left on Day0 – Just ahead of Mars on Day 1
====*====*= 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 42+ minutes round trip.

===
Earth Distance 2023/08/29 371,103,737 (increasing)
Earth Distance 2023/08/28 370,689,555 (increasing)
Earth Distance 2023/08/27 370,252,176 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 239 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 239 is Monday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1933 2023-08-30 06:10:17

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/17 Tuesday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/08/30 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 111.4 Sol Number: 240  Change in degrees is +.4 Julian date is: J0037240
Solar Longitude: 111.0 Sol Number: 239  Change in degrees is +.5 Julian date is: J0037239
Solar Longitude: 110.5 Sol Number: 238  Change in degrees is +.5 Julian date is: J0037238
==#

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:   243,176,871 km [22.6 km/s] Difference is -126734 <= -5281 km/hour at 08.0 on 08/30 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,303,605 km [22.6 km/s] Difference is -125539 <= -5231 km/hour at 08.0 on 08/29 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,429,144 km [22.5 km/s] Difference is -124341 <= -5181 km/hour at 08.0 on 08/28 (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 upper right to lower left in the view from Earth.
Next up: Star in path TYC 4939-592-1 RA 12h 09m 13.5s at far left on Day 0 -
TYC 280-736-1 RA 12h 05m 50.0s just ahead of 11 hour marker on Day 0 – Day 1 above 11 hours past marker – probably last day for 736
TYC 280-449-1 RA 12h 04m 41.5s at far left on Day0 – Just ahead of Mars on Day 1 – Still visible at far upper right on Day 1 – last day for 449
====*====*= 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 42+ minutes round trip.

===
Earth Distance 2023/08/30 371,530,000 (increasing)
Earth Distance 2023/08/29 371,103,737 (increasing)
Earth Distance 2023/08/28 370,689,555 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 230 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 240 is Tuesday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1934 2023-08-31 06:06:51

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/18 Wednesday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/08/31 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 111.9 Sol Number: 241  Change in degrees is +.5 Julian date is: J0037241
Solar Longitude: 111.4 Sol Number: 240  Change in degrees is +.4 Julian date is: J0037240
Solar Longitude: 111.0 Sol Number: 239  Change in degrees is +.5 Julian date is: J0037239
==#

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:   243,048,884 km [22.6 km/s] Difference is -127987 <= -5333 km/hour at 08.0 on 08/31 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,176,871 km [22.6 km/s] Difference is -126734 <= -5281 km/hour at 08.0 on 08/30 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,303,605 km [22.6 km/s] Difference is -125539 <= -5231 km/hour at 08.0 on 08/29 (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 upper right to lower left in the view from Earth.
TYC 4939-592-1 RA 12h 09m 13.5s at far left on Day 0 – Day 1 Just above Mars
Next up: Star just above path TYC 4940-836-1 RA 12h 10m 51.1s well ahead of 11 hour marker on Day 0 -
====*====*=== 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 42+ minutes round trip.

===
Earth Distance 2023/08/31 371,929,651 (increasing)
Earth Distance 2023/08/30 371,530,000 (increasing)
Earth Distance 2023/08/29 371,103,737 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 241 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 241 is Wednesday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1935 2023-09-01 06:28:54

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/19 Thursday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/01 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 112.3 Sol Number: 242  Change in degrees is +.4 Julian date is: J0037242
Solar Longitude: 111.9 Sol Number: 241  Change in degrees is +.5 Julian date is: J0037241
Solar Longitude: 111.4 Sol Number: 240  Change in degrees is +.4 Julian date is: J0037240
==#

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:   242,919,847 km [22.6 km/s] Difference is -129037 <= -5377 km/hour at 08.0 on 09/01 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,048,884 km [22.6 km/s] Difference is -127987 <= -5333 km/hour at 08.0 on 08/31 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,176,871 km [22.6 km/s] Difference is -126734 <= -5281 km/hour at 08.0 on 08/30 (time 8:00) (24 hours)
====*===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from upper right to lower left in the view from Earth.
Next up: Galaxy just below path PGC 1133453 (pair) RA 12h 13m 45.3s at far left on Day 0 -
TYC 4940-836-1 RA 12h 10m 51.1s well ahead of 11 hour marker on Day 0 – Day 1 near 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 downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

Light travel time today is between 20 and 21 minutes. Communications delay would be 42+ minutes round trip.

===
Earth Distance 2023/09/01 372,344,444 (increasing)
Earth Distance 2023/08/31 371,929,651 (increasing)
Earth Distance 2023/08/30 371,530,000 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 242 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 242 is Thursday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1936 2023-09-02 06:49:29

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/20 Friday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/02 Saturday (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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 112.8 Sol Number: 243  Change in degrees is +.5 Julian date is: J0037243
Solar Longitude: 112.3 Sol Number: 242  Change in degrees is +.4 Julian date is: J0037242
Solar Longitude: 111.9 Sol Number: 241  Change in degrees is +.5 Julian date is: J0037241
==#

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:   242,789,585 km [22.6 km/s] Difference is -130262 <= -5428 km/hour at 08.0 on 09/02 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,919,847 km [22.6 km/s] Difference is -129037 <= -5377 km/hour at 08.0 on 09/01 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   243,048,884 km [22.6 km/s] Difference is -127987 <= -5333 km/hour at 08.0 on 08/31 (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 upper right to lower left in the view from Earth.
Next up: Star just above path TYC 4940-106-1 RA 12h 10m 15.9s at far left on Day 0 -
PGC 1133453 (pair) RA 12h 13m 45.3s at far left on Day 0 – Day 1 Just past Mars – 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 downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/02 372,764,249 (increasing)
Earth Distance 2023/09/01 372,344,444 (increasing)
Earth Distance 2023/08/31 371,929,651 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 243 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 243 is Friday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1937 2023-09-03 06:10:41

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/21 Saturday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/03 Sunday (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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 113.2 Sol Number: 244  Change in degrees is +.4 Julian date is: J0037244
Solar Longitude: 112.8 Sol Number: 243  Change in degrees is +.5 Julian date is: J0037243
Solar Longitude: 112.3 Sol Number: 242  Change in degrees is +.4 Julian date is: J0037242
==#

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:   242,658,142 km [22.6 km/s] Difference is -131443 <= -5477 km/hour at 08.0 on 09/03 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,789,585 km [22.6 km/s] Difference is -130262 <= -5428 km/hour at 08.0 on 09/02 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,919,847 km [22.6 km/s] Difference is -129037 <= -5377 km/hour at 08.0 on 09/01 (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 upper right to lower left in the view from Earth.
Next up: Star below path TYC 4940-264-1 RA 12h 18m 48.1s ahead of 11 hour marker on Day 0 -
TYC 4940-106-1 RA 12h 16m 15.9s at far left on Day 0 – Day 1 just above 11 hour marker past Mars
====*====*=== 

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

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/03 373,260,999 (increasing)
Earth Distance 2023/09/02 372,764,249 (increasing)
Earth Distance 2023/09/01 372,344,444 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 244 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 244 is Saturday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1938 2023-09-04 06:11:38

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/22 Sunday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/04 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 113.7 Sol Number: 245  Change in degrees is +.5 Julian date is: J0037245
Solar Longitude: 113.2 Sol Number: 244  Change in degrees is +.4 Julian date is: J0037244
Solar Longitude: 112.8 Sol Number: 243  Change in degrees is +.5 Julian date is: J0037243
==#

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:   242,525,540 km [22.6 km/s] Difference is -132602 <= -5525 km/hour at 08.0 on 09/04 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,658,142 km [22.6 km/s] Difference is -131443 <= -5477 km/hour at 08.0 on 09/03 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,789,585 km [22.6 km/s] Difference is -130262 <= -5428 km/hour at 08.0 on 09/02 (time 8:00) (24 hours)
====*===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from upper right to lower left in the view from Earth.
Next up: Galaxies across path (top:PGC 1116776) (below:PGC 1114640) RA 12h 20m 23.3s at far left on Day 0 -
TYC 4940-264-1 RA 12h 18m 48.1s ahead of 11 hour marker on Day 0 – Day 1 below Mars – 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 downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/04 373,483,993 (increasing)
Earth Distance 2023/09/03 373,260,999 (increasing)
Earth Distance 2023/09/02 372,764,249 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 245 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 245 is Sunday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1939 2023-09-05 06:05:08

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/23 Monday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/05 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 114.2 Sol Number: 246  Change in degrees is +.5 Julian date is: J0037246
Solar Longitude: 113.7 Sol Number: 245  Change in degrees is +.5 Julian date is: J0037245
Solar Longitude: 113.2 Sol Number: 244  Change in degrees is +.4 Julian date is: J0037244
==#

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:   242,391,817 km [22.6 km/s] Difference is -133723 <= -5572 km/hour at 08.0 on 09/05 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,525,540 km [22.6 km/s] Difference is -132602 <= -5525 km/hour at 08.0 on 09/04 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,658,142 km [22.6 km/s] Difference is -131443 <= -5477 km/hour at 08.0 on 09/03 (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 upper right to lower left in the view from Earth.
Next up: Galaxy at far left PGC 1108662 RA 12h 23m 10.3s just above path on Day 0 -
(top:PGC 1116776) (below:PGC 1114640) RA 12h 20m 23.3s at far left on Day 0 – Day 1 past 5.5 hours past marker – last day for this pair
====*====*=== 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/05 373,848,411 (increasing)
Earth Distance 2023/09/04 373,483,993 (increasing)
Earth Distance 2023/09/03 373,260,999 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 246 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 246 is Monday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1940 2023-09-06 06:13:03

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/24 Tuesday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/06 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 114.6 Sol Number: 247  Change in degrees is +.4 Julian date is: J0037247
Solar Longitude: 114.2 Sol Number: 246  Change in degrees is +.5 Julian date is: J0037246
Solar Longitude: 113.7 Sol Number: 245  Change in degrees is +.5 Julian date is: J0037245
==#

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:   242,256,932 km [22.7 km/s] Difference is -134885 <= -5620 km/hour at 08.0 on 09/06 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,391,817 km [22.6 km/s] Difference is -133723 <= -5572 km/hour at 08.0 on 09/05 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,525,540 km [22.6 km/s] Difference is -132602 <= -5525 km/hour at 08.0 on 09/04 (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 upper right to lower left in the view from Earth.
Next up: Micro-Boomer at far left in path: HIP 60625 RA 12h 25m 30.2s Day 0 -
PGC 1108662 RA 12h 23m 10.3s just above path on Day 0 – Day 1 directly above 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 downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/06 374,252,222 (increasing)
Earth Distance 2023/09/05 373,848,411 (increasing)
Earth Distance 2023/09/04 373,483,993 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 247 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 247 is Tuesday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1941 2023-09-07 06:47:00

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/25 Wednesday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/07 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 115.1 Sol Number: 248  Change in degrees is +.5 Julian date is: J0037248
Solar Longitude: 114.6 Sol Number: 247  Change in degrees is +.4 Julian date is: J0037247
Solar Longitude: 114.2 Sol Number: 246  Change in degrees is +.5 Julian date is: J0037246
==#

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:   242,120,912 km [22.7 km/s] Difference is -136020 <= -5668 km/hour at 08.0 on 09/07 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,256,932 km [22.7 km/s] Difference is -134885 <= -5620 km/hour at 08.0 on 09/06 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,391,817 km [22.6 km/s] Difference is -133723 <= -5572 km/hour at 08.0 on 09/05 (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 upper right to lower left in the view from Earth.
Next up: Another Micro-Boomer HIP 60806 RA 12h 27m 46.4s in (or just below) path and far left on Day 0 -
HIP 60625 RA 12h 25m 30.2s Day 0 – Day 1 under 5.5 hours past marker – probably last day for 625
====*====*=== 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/07 374,602,477 (increasing)
Earth Distance 2023/09/06 374,252,222 (increasing)
Earth Distance 2023/09/05 373,848,411 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 248 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 248 is Wednesday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1942 2023-09-08 06:25:59

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/26 Thursday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/08 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 115.6 Sol Number: 249  Change in degrees is +.5 Julian date is: J0037249
Solar Longitude: 115.1 Sol Number: 248  Change in degrees is +.5 Julian date is: J0037248
Solar Longitude: 114.6 Sol Number: 247  Change in degrees is +.4 Julian date is: J0037247
==#

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

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

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

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

===
Distance: Mars >> Sun per theskylive.com:   241,983,776 km [22.7 km/s] Difference is -137136 <= -5714 km/hour at 08.0 on 09/08 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,120,912 km [22.7 km/s] Difference is -136020 <= -5668 km/hour at 08.0 on 09/07 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,256,932 km [22.7 km/s] Difference is -134885 <= -5620 km/hour at 08.0 on 09/06 (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 upper right to lower left in the view from Earth.
Next up: Galaxy just below path and at far left: PGC 1086413 RA 12h 29m 51.9s Day 0-
HIP 60806 RA 12h 27m 46.4s in (or just below) path and far left on Day 0 – Day 1 right at 5.5 hours past marker …. last day for 806
====*====*=== 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/08 374,910,186 (increasing)
Earth Distance 2023/09/07 374,602,477 (increasing)
Earth Distance 2023/09/06 374,252,222 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 249 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 249 is Thursday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1943 2023-09-09 06:13:34

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/27 Friday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/09 Saturday (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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 116.0 Sol Number: 250  Change in degrees is +.4 Julian date is: J0037250
Solar Longitude: 115.6 Sol Number: 249  Change in degrees is +.5 Julian date is: J0037249
Solar Longitude: 115.1 Sol Number: 248  Change in degrees is +.5 Julian date is: J0037248
==#

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

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

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

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

===
Distance: Mars >> Sun per theskylive.com:   241,845,503 km [22.7 km/s] Difference is -138273 <= -5761 km/hour at 08.0 on 09/09 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,983,776 km [22.7 km/s] Difference is -137136 <= -5714 km/hour at 08.0 on 09/08 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   242,120,912 km [22.7 km/s] Difference is -136020 <= -5668 km/hour at 08.0 on 09/07 (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 upper right to lower left in the view from Earth.
Next up: Galaxy below path and at far left – PGC 41514 RA 12h 31m 58.2s Day 0 -
PGC 1086413 RA 12h 29m 51.9s Day 0-  Day 1 right at (just past) 5.5 hours past marker – last day for 413
====*====*=== 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/09 375,236,777 (increasing)
Earth Distance 2023/09/08 374,910,186 (increasing)
Earth Distance 2023/09/07 374,602,477 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 250 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 250 is Friday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1944 2023-09-10 06:18:28

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/09/28 Saturday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))
One day note: Last day of Month 9
Today on Earth: 2023/09/10 Sunday (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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 116.5 Sol Number: 251  Change in degrees is +.5 Julian date is: J0037251
Solar Longitude: 116.0 Sol Number: 250  Change in degrees is +.4 Julian date is: J0037250
Solar Longitude: 115.6 Sol Number: 249  Change in degrees is +.5 Julian date is: J0037249
==#

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

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

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

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

===
Distance: Mars >> Sun per theskylive.com:   241,706,137 km [22.7 km/s] Difference is -139366 <= -5807 km/hour at 08.0 on 09/10 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,845,503 km [22.7 km/s] Difference is -138273 <= -5761 km/hour at 08.0 on 09/09 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,983,776 km [22.7 km/s] Difference is -137136 <= -5714 km/hour at 08.0 on 09/08 (time 8:00) (24 hours)
====*===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from upper right to lower left in the view from Earth.
Next up: Trio of galaxies above path: PGC 1080088 high 1078162 low RA 12h 34m 38.0s Day 0 -
PGC 41514 RA 12h 31m 58.2s Day 0 – Day 1 midway between 5.5 and 11 hour markers – last day for 514
====*====*=== 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/10 375,540,722 (increasing)
Earth Distance 2023/09/09 375,236,777 (increasing)
Earth Distance 2023/09/08 374,910,186 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 251 is in Month 09 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  09 extends from Sol 224 through 251. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 251 is Saturday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 9 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1945 2023-09-11 06:11:15

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/10/01 Sunday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))
One day note: First day of Month 10
Today on Earth: 2023/09/11 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 116.9 Sol Number: 252  Change in degrees is +.4 Julian date is: J0037252
Solar Longitude: 116.5 Sol Number: 251  Change in degrees is +.5 Julian date is: J0037251
Solar Longitude: 116.0 Sol Number: 250  Change in degrees is +.4 Julian date is: J0037250
==#

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

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

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

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

===
Distance: Mars >> Sun per theskylive.com:   241,565,640 km [22.7 km/s] Difference is -140497 <= -5854 km/hour at 08.0 on 09/11 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,706,137 km [22.7 km/s] Difference is -139366 <= -5807 km/hour at 08.0 on 09/10 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,845,503 km [22.7 km/s] Difference is -138273 <= -5761 km/hour at 08.0 on 09/09 (time 8:00) (24 hours)
====*===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from upper right to lower left in the view from Earth.
Next up: Star above path TYC 4951-139-1 RA 12h 37m 00.2s at far left on Day 0 -
PGC 1080088 high 1078162 low RA 12h 34m 38.0s Day 0 – Day 1 Above 10 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 downward angle.
As of 2023/01/11, the curve of the path has returned to regular movement to the left border

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/11 375,901,111 (increasing)
Earth Distance 2023/09/10 375,540,722 (increasing)
Earth Distance 2023/09/09 375,236,777 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 252 is in Month 10 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  10 extends from Sol 252 through 279. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 252 is Sunday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 10 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1946 2023-09-12 06:13:12

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/10/02 Monday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/12 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 117.4 Sol Number: 253  Change in degrees is +.5 Julian date is: J0037253
Solar Longitude: 116.9 Sol Number: 252  Change in degrees is +.4 Julian date is: J0037252
Solar Longitude: 116.5 Sol Number: 251  Change in degrees is +.5 Julian date is: J0037251
==#

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

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

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

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

===
Distance: Mars >> Sun per theskylive.com:   241,424,083 km [22.7 km/s] Difference is -141557 <= -5898 km/hour at 08.0 on 09/12 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,565,640 km [22.7 km/s] Difference is -140497 <= -5854 km/hour at 08.0 on 09/11 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,706,137 km [22.7 km/s] Difference is -139366 <= -5807 km/hour at 08.0 on 09/10 (time 8:00) (24 hours)
====*===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from upper right to lower left in the view from Earth.
Next up: Star just ahead of 11 hour marker in path: TYC 4951-743-1 RA 12h 39m 09.3s Day 0 -
TYC 4951-139-1 RA 12h 37m 00.2s at far left on Day 0 – Day 1 above 11 hours past marker – last day for 139
====*====*=== 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/12 376,190,287 (increasing)
Earth Distance 2023/09/11 375,901,111 (increasing)
Earth Distance 2023/09/10 375,540,722 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 253 is in Month 10 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  10 extends from Sol 252 through 279. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 253 is Monday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 10 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1947 2023-09-13 06:13:09

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/10/03 Tuesday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/13 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 117.9 Sol Number: 254  Change in degrees is +.5 Julian date is: J0037254
Solar Longitude: 117.4 Sol Number: 253  Change in degrees is +.5 Julian date is: J0037253
Solar Longitude: 116.9 Sol Number: 252  Change in degrees is +.4 Julian date is: J0037252
==#

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

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

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

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

===
Distance: Mars >> Sun per theskylive.com:   241,281,407 km [22.8 km/s] Difference is -142676 <= -5945 km/hour at 08.0 on 09/13 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,424,083 km [22.7 km/s] Difference is -141557 <= -5898 km/hour at 08.0 on 09/12 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,565,640 km [22.7 km/s] Difference is -140497 <= -5854 km/hour at 08.0 on 09/11 (time 8:00) (24 hours)
====*===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from upper right to lower left in the view from Earth.
Next up: star above path at 10 hours ahead marker: TYC 4952-516-1 RA 12h 41m 19.6s Day 0 -
TYC 4951-743-1 RA 12h 39m 09.3s Day 0 – Day 1 square on 10 hours past marker – last day for 743
====*====*=== 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/13 376,465,777 (increasing)
Earth Distance 2023/09/12 376,190,287 (increasing)
Earth Distance 2023/09/11 375,901,111 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 254 is in Month 10 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  10 extends from Sol 252 through 279. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 254 is Tuesday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 10 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1948 2023-09-14 06:15:51

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/10/04 Wednesday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/14 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 118.3 Sol Number: 255  Change in degrees is +.4 Julian date is: J0037255
Solar Longitude: 117.9 Sol Number: 254  Change in degrees is +.5 Julian date is: J0037254
Solar Longitude: 117.4 Sol Number: 253  Change in degrees is +.5 Julian date is: J0037253
==#

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

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

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

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

===
Distance: Mars >> Sun per theskylive.com:   241,137,665 km [22.8 km/s] Difference is -143742 <= -5989 km/hour at 08.0 on 09/14 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,281,407 km [22.8 km/s] Difference is -142676 <= -5945 km/hour at 08.0 on 09/13 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,424,083 km [22.7 km/s] Difference is -141557 <= -5898 km/hour at 08.0 on 09/12 (time 8:00) (24 hours)
====*===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from upper right to lower left in the view from Earth.
Next up: Galaxy below path and ahead of 10 hour marker RA 12h 43m 43.3s PGC 1061493 Day 0 -
TYC 4952-516-1 RA 12h 41m 19.6s Day 0 – Day 1 above and past 10 hours marker – last day for 516
====*====*=== 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/14 376,759,999 (increasing)
Earth Distance 2023/09/13 376,465,777 (increasing)
Earth Distance 2023/09/12 376,190,287 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 255 is in Month 10 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  10 extends from Sol 252 through 279. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 255 is Wednesday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 10 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1949 2023-09-15 06:13:02

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/10/05 Thursday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/15 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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 118.8 Sol Number: 256  Change in degrees is +.5 Julian date is: J0037256
Solar Longitude: 118.3 Sol Number: 255  Change in degrees is +.4 Julian date is: J0037255
Solar Longitude: 117.9 Sol Number: 254  Change in degrees is +.5 Julian date is: J0037254
==#

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

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

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

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

===
Distance: Mars >> Sun per theskylive.com:   240,992,861 km [22.8 km/s] Difference is -144804 <= -6034 km/hour at 08.0 on 09/15 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,137,665 km [22.8 km/s] Difference is -143742 <= -5989 km/hour at 08.0 on 09/14 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,281,407 km [22.8 km/s] Difference is -142676 <= -5945 km/hour at 08.0 on 09/13 (time 8:00) (24 hours)
====*===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from upper right to lower left in the view from Earth.
Next up: Star in path at far left TYC 4952-978-1 RA 12h 46m 21.8s Day 0 -
RA 12h 43m 43.3s PGC 1061493 Day 0 – Day 1 under 10 hours past marker – last day for 493
====*====*=== 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/15 377,014,444 (increasing)
Earth Distance 2023/09/14 376,759,999 (increasing)
Earth Distance 2023/09/13 376,465,777 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 256 is in Month 10 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  10 extends from Sol 252 through 279. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 256 is Thursday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 10 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

#1950 2023-09-16 06:15:04

tahanson43206
Moderator
Registered: 2018-04-27
Posts: 17,057

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

===
Today on Mars: 0037/10/06 Friday Days of the week offset 1 with Earth.  (count from Mars to Earth (updated 2023/08/20))

Today on Earth: 2023/09/16 Saturday (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: 4 <<== The Astronomical month will increment when longitude reaches 120 degrees

===
Solar Longitude: 119.3 Sol Number: 257  Change in degrees is +.5 Julian date is: J0037257
Solar Longitude: 118.8 Sol Number: 256  Change in degrees is +.5 Julian date is: J0037256
Solar Longitude: 118.3 Sol Number: 255  Change in degrees is +.4 Julian date is: J0037255
==#

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

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

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

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

===
Distance: Mars >> Sun per theskylive.com:   240,846,982 km [22.8 km/s] Difference is -145879 <= -6078 km/hour at 08.0 on 09/16 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   240,992,861 km [22.8 km/s] Difference is -144804 <= -6034 km/hour at 08.0 on 09/15 (time 8:00) (24 hours)
Distance: Mars >> Sun per theskylive.com:   241,137,665 km [22.8 km/s] Difference is -143742 <= -5989 km/hour at 08.0 on 09/14 (time 8:00) (24 hours)
====*===

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

=== Mars is in Regular Movement as seen from Earth. Mars is progressing from upper right to lower left in the view from Earth.
Nice collection: Star in path: TYC 4952-684-1 RA 12h 49m 28.8s – Day 0 -
TYC 4952-978-1 RA 12h 46m 21.8s Day 0 – Day 1 just behind 11 hours past marker – last day for 978
====*====*=== 

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

Light travel time today is between 20 and 21 minutes. Communications delay would be 40+ minutes round trip.

===
Earth Distance 2023/09/16 377,30,666 (increasing)
Earth Distance 2023/09/15 377,014,444 (increasing)
Earth Distance 2023/09/14 376,759,999 (increasing)
#>

Light travel in one second is (about) 300,000 kilometers. The distance covered in one minute is about 18,000,000 kilometers. Estimated light times:
1:18, 2:36, 3:54, 4:72, 5:90, 6:108, 7:126, 8:144,9:162,10:180,11:198,12:216,13:234,14:252,15:270,16:288,17:306,18:324,19:342,20:360,21:378,22:396

Mars and Earth are moving apart after Opposition.  Maximum Earth-Mars is estimated to be 401 kilometers (both at apogee and opposite vs Sun)
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

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 257 is in Month 10 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month  10 extends from Sol 252 through 279. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 07
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 257 is Friday  in the Proposed Business calendar for Mars. 
##

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  July 14, 2023 on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
The next Skip day is expected August 20, 2023 (range 26th >> 28th) on Earth.  The week days are in alignment until end of Month 06

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 also change 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* or J0037*
Refinements of the search include: Author: tahanson43206 Topic: Martian Politics and Economy (Specify Posts instead of Topics)
The most recent End-Of-Quarter change occurred:

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 Copyright ® 2023 NewMars.com Mars Society
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 10 of 24: - Quarter 2 of 4 [Months 7-12] (This month has 28 Sols)

Offline

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