New Mars Forums

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/07 Saturday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/17 Sunday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note: 

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 349.0  Sol Number: 648  Change in degrees is +.5
Previous SL:      348.5  Previous Sol: 647

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   229,029,282 km Difference is +180616 <= 8063 km/hour at 9.5 on 01/17 (time:9:30)
Distance of Mars from the Sun is given by theskylive.com as:   228,848,666 km Difference is +225235 <= 8073 km/hour at 11.1 on 01/16 (time:11:06)
Distance of Mars from the Sun is given by theskylive.com as:   228,623,431 km Difference is +185901 <= 8082 km/hour at 7.2 on 01/15 (time:7:12)

Next up: Galaxy PGC 1455216 RA 2h 9m 42.5s Just above path Day 0 Ahead about 14 hours
Star TYC 636-814-1 Magnitude 11.48 In path - just above Day 1 Right at Mars - good for at least on more day
Galaxy PGC 1445761 RA 2h 8m 35.8s below path Day 2 Just past Mars - may last another day - it did - last day for 761

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth

Light travel time is between 8 and 9 minutes. Communications delay would be 16+ minutes round trip. [8:144,000,000] [9:162,000,000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 648 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 648 is Saturday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/08 Sunday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/18 Monday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note: 

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 349.5  Sol Number: 649  Change in degrees is +.5
Previous SL:      349.0  Previous Sol: 648

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   229,209,641 km Difference is +180359 <= 8052 km/hour at 7.9 on 01/18 (time:7:54)
Distance of Mars from the Sun is given by theskylive.com as:   229,029,282 km Difference is +180616 <= 8063 km/hour at 9.5 on 01/17 (time:9:30)
Distance of Mars from the Sun is given by theskylive.com as:   228,848,666 km Difference is +225235 <= 8073 km/hour at 11.1 on 01/16 (time:11:06)

Next up: Star TYC 636-294-1 mAGNITUDE 10.86 in path Day 0 about 24 hours ahead
Next up: Galaxy PGC 212928 RA 2h 11m 36.9s In path Day 0 about 14 hours ahead
Galaxy PGC 1455216 RA 2h 9m 42.5s Just above path Day 1 behind about 7 hours - last day for 1455216

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth

Light travel time is between 8 and 9 minutes. Communications delay would be 16+ minutes round trip. [8:144,000,000] [9:162,000,000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 649 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 649 is Sunday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/09 Monday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/19 Tuesday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:   Mars has reached a longitude of 350 degrees ... only 20 more Earth days (give or take) remain before New Year's on Mars

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 350.0  Sol Number: 650  Change in degrees is +.5
Previous SL:      349.5  Previous Sol: 649

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   229,422,737 km Difference is +213096 <= 8041 km/hour at 9.4 on 01/19 (time:9:24)
Distance of Mars from the Sun is given by theskylive.com as:   229,209,641 km Difference is +180359 <= 8052 km/hour at 7.9 on 01/18 (time:7:54)
Distance of Mars from the Sun is given by theskylive.com as:   229,029,282 km Difference is +180616 <= 8063 km/hour at 9.5 on 01/17 (time:9:30)

Next up: Star HIP 10353 Magnitude 9.21 Well below path Day 0 Ahead about 8 hours
Star TYC 636-294-1 Magnitude 10.86 in path Day  1 Just ahead of Mars - likely good for one more day
Galaxy PGC 212928 RA 2h 11m 36.9s In path Day 1 about 8 hours past Mars - likely last day for 212928

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth

Light travel time is between 8 and 9 minutes. Communications delay would be 16+ minutes round trip. [8:144,000,000] [9:162,000,000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 650 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 650 is Monday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/10 Tuesday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/20 Wedesday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:   

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 350.5  Sol Number: 651  Change in degrees is +.5
Previous SL:      350.0  Previous Sol: 645

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   229,602,602 km Difference is +392961 <= 8036 km/hour at 8.8 on 01/20 (time:8:48) (*)
Distance of Mars from the Sun is given by theskylive.com as:   229,422,737 km Difference is +213096 <= 8041 km/hour at 9.4 on 01/19 (time:9:24)
Distance of Mars from the Sun is given by theskylive.com as:   229,209,641 km Difference is +180359 <= 8052 km/hour at 7.9 on 01/18 (time:7:54)

(*) Result is for 48.9 hours. The result for 23,4 hours was anomalous.

Next up: Tiny galaxy image PGC 1468633 RA 2h 16m 22.0s Just below path Day 0 about 20 hours ahead
Next up: Star TYC 637-696 Magnitude 9.62 Just above path Day 0 about 12 hours ahead
Star HIP 10353 Magnitude 9.21 Well below path Day 1 Still visible at bottom of screen - about 14 hours behind - last day for 10353
Star TYC 636-294-1 Magnitude 10.86 in path Day  2 at edge of screen. Last day for 636-294

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth

Light travel time is between 8 and 9 minutes. Communications delay would be 16+ minutes round trip. [8:144,000,000] [9:162,000,000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 651 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 651 is Tuesday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/11 Wednesday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/21 Thursday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:   

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 351.0  Sol Number: 652  Change in degrees is +.5
Previous SL:      350.5  Previous Sol: 651

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   229,796,705 km Difference is +194103 <= 8021 km/hour at 9.0 on 01/21 (time:9:00)
Distance of Mars from the Sun is given by theskylive.com as:   229,602,602 km Difference is +392961 <= 8036 km/hour at 8.8 on 01/20 (time:8:48) (*)
Distance of Mars from the Sun is given by theskylive.com as:   229,422,737 km Difference is +213096 <= 8041 km/hour at 9.4 on 01/19 (time:9:24)

(*) Result is for 48.9 hours. The result for 23,4 hours was anomalous.

Next up: Star 637-824-1 Magnitude 11.14 in path Day 0 about 13 hours ahead
Tiny galaxy image PGC 1468633 RA 2h 16m 22.0s Just below path Day 1 just past Mars - good for another day
Star TYC 637-696 Magnitude 9.62 Just above path Day 1 about 12 hours behind - might last another day

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth

Light travel time is between 8 and 9 minutes. Communications delay would be 16+ minutes round trip. [8:144,000,000] [9:162,000,000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 652 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 652 is Wednesday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/12 Thursday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/22 Friday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:   

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 351.5  Sol Number: 653  Change in degrees is +.5
Previous SL:      351.0  Previous Sol: 652

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   229,971,106 km Difference is +174401 <= 8000 km/hour at 6.8 on 01/212 (time:6:48)
Distance of Mars from the Sun is given by theskylive.com as:   229,796,705 km Difference is +194103 <= 8021 km/hour at 9.0 on 01/21 (time:9:00)
Distance of Mars from the Sun is given by theskylive.com as:   229,602,602 km Difference is +392961 <= 8036 km/hour at 8.8 on 01/20 (time:8:48) (*)

(*) Result is for 48.9 hours. The result for 23,4 hours was anomalous.

Next up: Galaxy PGC 8826 Magnitude 15.70 just above path Day 0 about 10 hours ahead
Star 637-824-1 Magnitude 11.14 in path Day 1 about 12 hours behind - this is likely the last day for 824
Tiny galaxy image PGC 1468633 RA 2h 16m 22.0s Just below path Day 2 On edge of screen ... last day for 633

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth

Light travel time is between 8 and 9 minutes. Communications delay would be 16+ minutes round trip. [8:144,000,000] [9:162,000,000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 653 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 653 is Thursday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/13 Friday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/23 Saturday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:   

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 352.1  Sol Number: 654  Change in degrees is +.6
Previous SL:      351.5  Previous Sol: 653

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   230,192.440 km Difference is +221334 <= 7990 km/hour at 10.5 on 01/23 (time:10:30)
Distance of Mars from the Sun is given by theskylive.com as:   229,971,106 km Difference is +174401 <= 8000 km/hour at 6.8 on 01/212 (time:6:48)
Distance of Mars from the Sun is given by theskylive.com as:   229,796,705 km Difference is +194103 <= 8021 km/hour at 9.0 on 01/21 (time:9:00)

Next up: Galaxy PGC 1484881 RA 2h 21m 50.4s just below TYC 1153 Day 0 about 20 hours ahead - may be good for two days
Next up: Star tYC 1215-1153-1 Magnitude 11.19 Just above path Day 0 about 20 hours ahead - may be good for two days
Galaxy PGC 8826 Magnitude 15.70 just above path Day 1 About 20 hours behind ... last day for 8826

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth

Light travel time is between 9 and 10 minutes. Communications delay would be 18+ minutes round trip. [9:162,000,000] [10:180,000.000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 654 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 654 is Friday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/14 Saturday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/24 Sunday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:   

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 352.6  Sol Number: 655  Change in degrees is +.5
Previous SL:      352.1  Previous Sol: 654

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   230,371,880 km Difference is +179440 <= 7975 km/hour at 9.0 on 01/24 (time:9:00)
Distance of Mars from the Sun is given by theskylive.com as:   230,192.440 km Difference is +221334 <= 7990 km/hour at 10.5 on 01/23 (time:10:30)
Distance of Mars from the Sun is given by theskylive.com as:   229,971,106 km Difference is +174401 <= 8000 km/hour at 6.8 on 01/212 (time:6:48)

Next up: A bright pair of stars: HIP 11134 Magnitude 9.21 is one. Day 0 below path and ahead about 6 hours - good for at least one day
Galaxy PGC 1484881 RA 2h 21m 50.4s just below TYC 1153 Day 1 likely good for another day
Star TYC 1215-1153-1 Magnitude 11.19 Just above path Day 1 About 6 hours behind - likely good for one more day

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth

Light travel time is between 9 and 10 minutes. Communications delay would be 18+ minutes round trip. [9:162,000,000] [10:180,000.000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 655 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 655 is Saturday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/15 Sunday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/25 Monday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:   

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 353.1  Sol Number: 656  Change in degrees is +.5
Previous SL:      352.6  Previous Sol: 655

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   230,563,745 km Difference is +191865 <= 7961 km/hour at 9.1 on 01/25 (time:9:06)
Distance of Mars from the Sun is given by theskylive.com as:   230,371,880 km Difference is +179440 <= 7975 km/hour at 9.0 on 01/24 (time:9:00)
Distance of Mars from the Sun is given by theskylive.com as:   230,192.440 km Difference is +221334 <= 7990 km/hour at 10.5 on 01/23 (time:10:30)

Next Up: Galaxy PGC 1491997 RA 2h 25m 59.6s just below path Day 0 about 20  hours ahead
Next Up: Star HIP 11233 Magnitude 8.87 Above path Day 0 about 5 hours ahead - good for another day
A bright pair of stars: HIP 11134 Magnitude 9.21 is one. Day 1 below path and behind over 13 hours ... last day for this bright pair

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth

Light travel time is between 9 and 10 minutes. Communications delay would be 18+ minutes round trip. [9:162,000,000] [10:180,000.000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 656 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 656 is Sunday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/16 Monday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/26 Tuesday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:   

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 353.6  Sol Number: 657  Change in degrees is +.5
Previous SL:      353.1  Previous Sol: 656

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   230,756,017 km Difference is +192272 <= 7912 km/hour at 9.3 on 01/26 (time:9:18)
Distance of Mars from the Sun is given by theskylive.com as:   230,563,745 km Difference is +191865 <= 7961 km/hour at 9.1 on 01/25 (time:9:06)
Distance of Mars from the Sun is given by theskylive.com as:   230,371,880 km Difference is +179440 <= 7975 km/hour at 9.0 on 01/24 (time:9:00)

Next up: Star TYC 1215-1499-1 Magnitude 11.53 in path Day 0 about 20 hours ahead
Galaxy PGC 1491997 RA 2h 25m 59.6s just below path Day 1 About 6 hours behind - last day for 1997

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth

Light travel time is between 9 and 10 minutes. Communications delay would be 18+ minutes round trip. [9:162,000,000] [10:180,000.000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 657 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 657 is Monday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/17 Tuesday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/27 Wednesday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:   

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 354.1  Sol Number: 658  Change in degrees is +.5
Previous SL:      353.6  Previous Sol: 657

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   230,966,117 km Difference is +210100 <= 7928 km/hour at 11.8 on 01/27 (time:11:48) (*)
Distance of Mars from the Sun is given by theskylive.com as:   230,756,017 km Difference is +192272 <= 7912 km/hour at 9.3 on 01/26 (time:9:18)
Distance of Mars from the Sun is given by theskylive.com as:   230,563,745 km Difference is +191865 <= 7961 km/hour at 9.1 on 01/25 (time:9:06)

(*) Off by a whisker ,... the amount should be about 7900 even, but the capture may have been off by seconds

Next up: Bright Star: TYC 1216-288-1 Magnitude 9.65 just below path Day 0 about 13 hours ahead ... definitely good for one more day
Star TYC 1215-1499-1 Magnitude 11.53 in path Day 1 About 7 hours behind - ** might ** be there tomorrow ... iffy

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth

Light travel time is between 9 and 10 minutes. Communications delay would be 18+ minutes round trip. [9:162,000,000] [10:180,000.000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 658 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 658 is Tuesday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/18 Wednesday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/28 Thursday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:   

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 354.6  Sol Number: 659  Change in degrees is +.5
Previous SL:      354.1  Previous Sol: 658

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   231,133,840 km Difference is +167723 <= 7949 km/hour at 9.0 on 01/28 (time:9:00)
Distance of Mars from the Sun is given by theskylive.com as:   230,966,117 km Difference is +210100 <= 7928 km/hour at 11.8 on 01/27 (time:11:48)
Distance of Mars from the Sun is given by theskylive.com as:   230,756,017 km Difference is +192272 <= 7912 km/hour at 9.3 on 01/26 (time:9:18)

Next up: Not much on offer ... will go with Star TYC 1216-1771-1 Magnitude 11.12 well above path Day 0 just ahead of Mars - may be visible one more day
Bright Star: TYC 1216-288-1 Magnitude 9.65 just below path Day 1 about 10 hours behind - last day for 288

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth

Light travel time is between 9 and 10 minutes. Communications delay would be 18+ minutes round trip. [9:162,000,000] [10:180,000.000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 659 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 659 is Wednesday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

SpaceNut

Administrator

From: New Hampshire

Registered: 2004-07-22

Posts: 29,433

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

Something that goes well with every day Space calendar 2021: Rocket launches, sky events, missions & more!

Just a few things remaining plus for the days ahead in 2021....

Jan. 28: The full moon of January, known as the Full Wolf Moon, arrives at 2:16 p.m. EST (1916 GMT).

Jan. 30: A SpaceX Falcon 9 rocket will launch approximately 60 satellites for SpaceX's Starlink broadband network, a mission designated Starlink 17. It will lift off from NASA's Kennedy Space Center in Florida, at 7:24 a.m. EST (1224 GMT). Watch it live

Jan. 31: The Brunswick-based startup bluShift Aerospace will attempt to launch the Stardust 1.0 prototype sounding rocket from the Loring Commerce Centre in Limestone, Maine, at 10 a.m. EST (1500 GMT). A previous launch attempt on Jan. 15 was called off due to bad weather. If successful, the mission will mark the first commercial launch of a rocket powered by bio-derived fuel. Stardust 1.0 is expected to reach an altitude of about 5,000 feet (1,500 meters). Watch it live

February
Feb. 1: NASA astronauts Mike Hopkins and Victor Glover are scheduled take their second spacewalk together outside the International Space Station; this time the astronauts will upgrade high-definition video and camera gear outside the orbiting lab. They are expected to exit the station through the Quest airlock at 7:05 a.m. EST (1205 GMT) and will spend about 6.5 hours spacewalking. Watch it live

Feb. 9: The United Arab Emirates' first mission to Mars, the Hope orbiter, will arrive at the Red Planet.

Feb. 10: China's Tianwen-1 Mars mission, which consists of an orbiter and a lander, will arrive in orbit around the Red Planet. (The rover won't land until May 2021).

Feb. 11: The new moon arrives at 2:06 p.m. EST (1906 GMT).

Feb. 14: A Russian Soyuz rocket will launch the Progress 77 cargo resupply spacecraft to the International Space Station. It will lift off from the Baikonur Cosmodrome in Kazakhstan, at 11:45 p.m. EST (0445 Feb. 15 GMT). Watch it live

Feb. 17: Russia's Progress 77 cargo resupply spacecraft will arrive at the International Space Station. Docking is scheduled for 1:19 a.m. EST (0619 GMT). Watch it live

Feb. 18: NASA's newest Mars rover Perseverance will arrive at the Red Planet. The rover is expected to touch down inside the 28-mile-wide (45 kilometers) Jezero Crater at approximately 3 p.m. EST (2000 GMT). Watch it live

Feb. 18: Conjunction of the moon and Mars. Just one day before reaching first quarter phase, the waxing crescent moon will swing about 4 degrees to the south of Mars in the evening sky.

Feb. 20: Northrop Grumman will use an Antares rocket to launch the Cygnus NG-15 cargo resupply spacecraft to the International Space Station. It will lift off from NASA's Wallops Flight Facility in Virginia, at 12:36 p.m. EST (1736 GMT). Watch it live

Feb. 22: Northrop Grumman's Cygnus NG-15 cargo resupply spacecraft will arrive at the International Space Station at 4:30 a.m. EST (0930 GMT). Watch it live

Feb. 25: A Russian Soyuz rocket will launch 36 satellites into orbit for the OneWeb internet constellation. It will lift off from the Vostochny Cosmodrome in Siberia. Watch it live

Feb. 27: The full moon of February, known as the Full Snow Moon, arrives at 3:17 a.m. EST (0817 GMT).

Feb. 28: Mercury reaches its highest point in morning sky, shining brightly at magnitude 0.1. Catch the innermost planet above the eastern horizon shortly before sunrise.

March
March 4: Arianespace will use an Ariane 5 ECA rocket, designated VA254, to launch the Star One D2 and Eutelsat Quantum communications satellites from the Guiana Spaceport near Kourou, French Guiana. Watch it live

March 6: Mercury at greatest elongation west. The innermost planet will reach its greatest western separation from the sun, shining brightly at magnitude 0.1. Catch the elusive planet above the eastern horizon shortly before sunrise.

March 9: Conjunction of the moon and Saturn. The waning crescent moon will swing about 4 degrees to the south of Saturn in the dawn sky.

March 10: Conjunction of the moon and Jupiter. The waning crescent moon will swing about 4 degrees to the south of Jupiter in the dawn sky.

March 13: The new moon arrives at 5:21 a.m. EST (1021 GMT).

March 19: Conjunction of the moon and Mars. The waxing crescent moon will swing about 2 degrees to the south of Mars in the evening sky.

March 20: Vernal Equinox. Today marks the first day of spring in the Northern Hemisphere and the first day of autumn in the Southern Hemisphere.

March 14: Daylight Saving Time begins. Turn your clocks forward one hour at 2 a.m. local time.

March 28: The full moon of March, known as the Full Worm Moon, arrives at 2:48 p.m. EDT (1817 GMT).

March 28: Venus reaches its greatest brightness in its 2021 evening apparition, shining brightly at magnitude -3.9. Catch the planet just above the western horizon at sunset.

March 29: A United Launch Alliance Atlas V rocket will launch Boeing's CST-100 Starliner spacecraft on its second uncrewed mission to the International Space Station, following a partial failure in December 2019. The Orbital Flight Test 2 mission will lift off from Cape Canaveral Space Force Station in Florida. Watch it live

March 30: SpaceX will launch the second operational flight of its Crew Dragon spacecraft to the International Space Station. Flying on the Crew-2 mission will be NASA astronauts Shane Kimbrough and Megan McArthur, JAXA astronaut Akihiko Hoshide and ESA astronaut Thomas Pesquet. Watch it live

April
April 6: Conjunction of the moon and Saturn. The waning crescent moon will swing about 4 degrees to the south of Saturn in the dawn sky.

April 7: Conjunction of the moon and Jupiter. The waning crescent moon will swing about 4 degrees to the south of Jupiter in the dawn sky.

April 10: A Russian Soyuz rocket will launch the crewed Soyuz MS-18 spacecraft to the International Space Station with Russian cosmonauts Oleg Novitsky, Pyotr Dubrov and Andrei Borisenko. It will lift off from the Baikonur Cosmodrome in Kazakhstan. Watch it live

April 11: The new moon arrives at 10:31 p.m. EDT (0231 April 12 GMT).

April 17: Lunar occultation of Mars. The waxing crescent moon will briefly pass in front of the planet Mars for skywatchers in parts of Asia. Elsewhere in the world, the moon will make a close approach to Mars. Look for the pair above the western horizon after sunset.

April 21-22: The Lyrid meteor shower, which is active April 16-30, peaks overnight.

April 26: The full moon of April, known as the Full Pink Moon, arrives at 11:32 p.m. EDT (0332 April 27 GMT). Because the moon will also be near perigee, or its closest point to Earth, this will also be a so-called "supermoon."

May
May 3: Conjunction of the moon and Saturn. The last-quarter moon will swing about 4 degrees to the south of Saturn in the dawn sky.

May 4: Conjunction of the moon and Jupiter. The waning crescent moon will swing about 4 degrees to the south of Jupiter in the dawn sky.

May 4: Star Wars Day. (May the Fourth be with you.)

May 4-5: The Eta Aquarid meteor shower, which is active from mid-April to the end of May, peaks overnight.

May 11: The new moon arrives at 3 p.m. EDT (1900 GMT).

May 15: Mercury reaches its highest point in the evening sky, shining brightly at magnitude 0.3. See it just above the western horizon right after sunset.

May 16: Conjunction of the moon and Mars. The waxing crescent moon will swing about 2 degrees to the south of Mars in the evening sky.

May 17: Mercury at greatest elongation east. The innermost planet will reach its greatest eastern separation from the sun, shining brightly at magnitude 0.3. Catch the elusive planet above the western horizon shortly after sunset.

May 26: The full moon of May, known as the Full Flower Moon, arrives at 7:14 a.m. EDT (1114 GMT). It will also be the closest "supermoon" of the year. That night, a total lunar eclipse, also known as a "Blood Moon," will be visible from Australia, parts of the western United States, western South America and Southeast Asia.

May 30: Conjunction of the moon and Saturn. The waning gibbous moon will swing about 4 degrees to the south of Saturn in the dawn sky.

June
June 1: Conjunction of the moon and Jupiter. Just one day before reaching last-quarter phase, the waning gibbous moon will swing about 5 degrees to the south of Jupiter in the dawn sky.

June 10: The new moon arrives at 6:53 a.m. EDT (1053 GMT).

June 10: An annular solar eclipse, also known as a "ring of fire" eclipse, will be visible from parts of Russia, Greenland and and northern Canada. Skywatchers in Northern Asia, Europe and the United States will see a partial eclipse.

June 13: Conjunction of the moon and Mars. The waxing crescent moon will swing about 3 degrees to the south of Mars in the evening sky.

June 20: The solstice arrives at 11:16 p.m. EDT (0316 June 21 GMT), marking the first day of summer in the Northern Hemisphere and the first day of winter in the Southern Hemisphere.

June 24: The full moon of June, known as the Full Strawberry Moon, arrives at 2:40 p.m. EDT (1940 GMT).

June 27: Conjunction of the moon and Saturn. The waning gibbous moon will swing about 4 degrees to the south of Saturn in the dawn sky.

June 28: Conjunction of the moon and Jupiter. The waning gibbous moon will swing about 4 degrees to the south of Jupiter in the dawn sky.

July
July 5: Happy aphelion day! Earth is farthest from the sun today.

July 9: Mercury reaches its highest point in the morning sky, shining brightly at magnitude 0.3. See it just above the southeast horizon just before sunrise.

July 9: The new moon arrives at 9:16 p.m. EDT (0116 July 10 GMT)

July 12: Conjunction of the moon and Venus. The waxing crescent moon will pass about 3 degrees to the north of Venus

July 23: The full moon of July, known as the Full Buck Moon, arrives at 10:37 p.m. EDT (1437 GMT).

July 24: Conjunction of the moon and Saturn. The full moon will swing about 4 degrees to the south of Saturn in the dawn sky.

July 25: Conjunction of the moon and Jupiter. The waning crescent moon will swing about 4 degrees to the south of Jupiter in the dawn sky.

August
Aug. 2: Saturn at opposition. The ringed planet will be directly opposite the sun in Earth's sky around the same time that it makes its closest approach to Earth all year. This means it will appear at its biggest and brightest of the year. Saturn will reach its highest point in the night sky around midnight. 

Aug. 8: The new moon arrives at 9:50 a.m. EDT (1350 GMT)

Aug. 11: Conjunction of the moon and Venus. The waxing crescent moon will pass about 4 degrees to the north of Venus. Look for the pair above the western horizon after sunset.

Aug. 11-12: The annual Perseid meteor shower, which is active from mid-July to the end of August, peaks overnight.

Aug. 19: Jupiter at opposition. The gas giant will be directly opposite the sun in Earth's sky around the same time that it makes its closest approach to Earth of the year. The planet will shine at its biggest and brightest tonight and will be visible all night long.

Aug. 20: Conjunction of the moon and Saturn. The waxing gibbous moon will swing about 3 degrees to the south of Saturn in the evening sky.

Aug. 22: The full moon of August, known as the Full Sturgeon Moon, occurs at 8:02 a.m. EDT (1202 GMT). This will also be a so-called "Blue Moon" because it is the third full moon in a season that has four full moons.

Aug. 22: Conjunction of the moon and Jupiter. The Blue Sturgeon moon will swing about 4 degrees to the south of Jupiter in the night sky.

September
Sept. 3: Mercury reaches its highest point in the evening sky. Shining at magnitude 0.1, the innermost planet will be barely visible above the western horizon at sunset.

Sept. 6: The new moon arrives at 8:52 p.m. EDT (0052 Sept. 7 GMT).

Sept. 9: Conjunction of the moon and Venus. The waxing crescent moon will pass about 4 degrees to the north of Venus. Look for the pair above the western horizon after sunset.

Sept. 13: Mercury at greatest elongation east. The innermost planet will reach its greatest eastern separation from the sun, shining brightly at magnitude 0.1. Catch the elusive planet above the western horizon shortly after sunset.

Sept. 14: Neptune at opposition. The gas giant will appear at its biggest and brightest of the year, shining at magnitude 7.8. (You'll need a telescope to see it.)

Sept. 16: Conjunction of the moon and Saturn. The waxing gibbous moon will swing about 3 degrees to the south of Saturn in the evening sky.

Sept. 18: Conjunction of the moon and Jupiter. The waxing gibbous moon will swing about 4 degrees to the south of Jupiter in the evening sky.

Sept. 20: The full moon of September, known as the Full Harvest Moon, occurs at 7:54 p.m. EDT (2354 GMT).

Sept. 22: The equinox arrives at 3:21 p.m. EDT (1921 GMT), marking the first day of autumn in the Northern Hemisphere and the first day of spring in the Southern Hemisphere.

Sept. 24: The waning gibbous moon and Uranus will make a close approach, passing within 1.3 degrees of each other. Shining at magnitude 5.7, Uranus may be bright enough to spot with the naked eye under dark skies.

October
Oct. 6: The new moon arrives at 7:05 a.m. EDT (1105 GMT)

Oct. 8: The Draconid meteor shower, which is active Oct. 6-10, will peak overnight.

Oct. 9: Conjunction of the moon and Venus. The waxing crescent moon will pass about 3 degrees to the north of Venus. Look for the pair above the western horizon after sunset.

Oct. 14: Conjunction of the moon and Saturn. The waxing gibbous moon will swing about 4 degrees to the south of Saturn in the evening sky.

Oct. 15: Conjunction of the moon and Jupiter. The waxing gibbous moon will swing about 4 degrees to the south of Jupiter in the evening sky.

Oct. 20: The full moon of October, known at the Full Hunter's Moon, occurs at 10:57 a.m. EDT (1457 GMT).

Oct. 21: The waning gibbous moon and Uranus will make a close approach, passing within 1.3 degrees of each other. Shining at magnitude 5.7, Uranus may be bright enough to spot with the naked eye under dark skies.

Oct. 21-22: The annual Orionid meteor shower, which is active all month long, peaks overnight.

Oct. 24: Mercury at greatest elongation west. The innermost planet will reach its greatest western separation from the sun, shining brightly at magnitude -0.6. Catch the elusive planet above the eastern horizon shortly before sunrise. The following day (Oct. 25) Mercury will reach its highest point in the morning sky.

November
Nov. 2-3: The annual South Taurid meteor shower peaks overnight. Active from mid-September to mid-November, the Southern Taurids rarely produce more than five visible meteors per hour, but the nearly-new moon should make them easier to spot against a dark sky.

Nov. 4: The new moon arrives at 5:15 p.m. EDT (2115 GMT).

Nov. 4: Uranus is at opposition, meaning it will appear at its biggest and brightest of the year. Shining at magnitude 5.7, the planet will be visible all night long in the constellation Aries. Uranus may be to the naked eye from dark locations but is best seen through a telescope or binoculars.

Nov. 7: Daylight Saving Time ends. Turn your clocks back one hour at 2 a.m. local time.

Nov. 8: Conjunction of the moon and Venus. The waxing crescent moon will pass about 1 degree to the north of Venus. Look for the pair above the western horizon after sunset. Skywatchers in parts of Eastern Asia will see the moon occult Venus, meaning it will briefly pass in front of the planet, blocking it from sight.

Nov. 10: Conjunction of the moon and Saturn. The waxing crescent moon will swing about 4 degrees to the south of Saturn in the evening sky.

Nov. 11: Conjunction of the moon and Jupiter. The first-quarter moon will swing about 4 degrees to the south of Jupiter in the evening sky.

Nov. 11-12: The annual North Taurid meteor shower peaks overnight. The shower, which is active from late October to mid-December, is not expected to produce more than a handful of visible "shooting stars" per hour.

Nov. 16-17: One of the most anticipated meteor showers of the year, the Leonid meteor shower peaks overnight. The Leonids are expected to produce about 15 meteors per hour on the night of the peak, but the shower is active all month long.

Nov. 19: The full moon of November, known as the Full Beaver Moon, occurs at 3:58 a.m. EST (0858 GMT).

Nov. 19: A partial lunar eclipse will be visible from North and South America, Australia, and parts of Europe and Asia. The moon will enter Earth's faint outer shadow, known as the penumbra, at 1:02 a.m. EDT (0602 GMT). The partial eclipse, when the moon will darken more noticeably, begins at 2:18 a.m. EDT (0718 GMT). Maximum eclipse occurs at 4:02 a.m. EDT (0902 GMT). The entire event will last about six hours.

December
Dec. 4: The only total solar eclipse of the year (and the last total solar eclipse until 2023) will be visible from Antarctica. Skywatchers in South Africa, Namibia, the southern tip of South America and some islands in the South Atlantic will be able to see at least a partial solar eclipse, with the moon blocking a portion of the sun from view.

Dec. 4: The new moon arrives at 2:44 a.m. EST (0744 GMT).

Dec. 6: Conjunction of the moon and Venus. The waxing crescent moon will pass about 2 degrees to the north of Venus. Look for the pair above the western horizon after sunset.

Dec. 7: Conjunction of the moon and Saturn. The waxing crescent moon will swing about 4 degrees to the south of Saturn in the evening sky.

Dec. 9: Conjunction of the moon and Jupiter. The waxing crescent moon will swing about 4 degrees to the south of Jupiter in the evening sky.

Dec. 13-14: The annual Geminid meteor shower, one of the best meteor showers of the year, peaks overnight. The Geminids are active Dec. 4-17 often produce up to 50 visible meteors per hours, but this year the 78% full moon will outshine the fainter meteors.

Dec. 18: The full moon of December, known as the Full Cold Moon, occurs at 11:37 p.m. EST (0437 Dec. 19 GMT).

Dec. 21: The solstice arrives at 10:59 a.m. EST (1559 GMT), marking the first day of winter in the Northern Hemisphere and the first day of summer in the Southern Hemisphere.

Dec. 21-22: The annual Ursid meteor shower peaks overnight. Typically active around Dec. 17-26, the Ursids produce about five to 10 visible meteors per hour on the morning of the peak.

Q1: A United Launch Alliance Atlas V rocket will launch the STP-3 rideshare mission for the U.S. Space Force. It will lift off from Cape Canaveral Space Force Station in Florida.

Q1: A Rocket Lab Electron rocket will launch on its first mission from a new launch pad at the Mid-Atlantic Regional Spaceport at Wallops Island, Virginia. It will launch an experimental mission for the U.S. Air Force's Space Test Program called Monolith, which carries a space weather instrument.

Early 2021: India's Small Satellite Launch Vehicle (SSLV) will launch on its first orbital test flight from the Satish Dhawan Space Center in Sriharikota, India.

Q2: A United Launch Alliance Delta IV Heavy rocket will launch a classified spy satellite for the U.S. National Reconnaissance Office. The mission, titled NROL-82, will lift off from Cape Canaveral Space Force Station in Florida.

Q2: A SpaceX Falcon Heavy rocket will launch the USSF-44 mission for the U.S. Air Force. The mission will lift off from NASA's Kennedy Space Center in Florida and is expected to deploy two undisclosed payloads into geosynchronous orbit.

Q2: A United Launch Alliance Atlas V rocket will launch the U.S. military's fifth Space Based Infrared System Geosynchronous satellite, or SBIRS GEO 5, from Cape Canaveral Space Force Station in Florida.

Mid-2021: An Arianespace Soyuz rocket will launch two satellites for Europe's Galileo navigation constellation. It will lift off from the Guiana Space Center near Kourou, French Guiana.

Mid-2021: An Arianespace Vega C rocket will launch the LARES 2 satellite for the Italian space agency. It will lift off from the Guiana Space Center near Kourou, French Guiana.

Mid-2021: A Russian Soyuz rocket will launch the Progress 78P cargo resupply spacecraft to the International Space Station from the Baikonur Cosmodrome in Kazakhstan.

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/19 Thursday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/29 Friday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:   

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 355.1  Sol Number: 660  Change in degrees is +.5
Previous SL:      354.6  Previous Sol: 659

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   231,310,727 km Difference is +176887 <= 7896 km/hour at 7.4 on 01/29 (time:7:24)
Distance of Mars from the Sun is given by theskylive.com as:   231,133,840 km Difference is +167723 <= 7949 km/hour at 9.0 on 01/28 (time:9:00)
Distance of Mars from the Sun is given by theskylive.com as:   230,966,117 km Difference is +210100 <= 7928 km/hour at 11.8 on 01/27 (time:11:48)

Next up: bright star: HIP 11920 Magnitude 9.52 Above path Day 0 ahead about 12 hours - should be good for another day
Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth

Light travel time is between 9 and 10 minutes. Communications delay would be 18+ minutes round trip. [9:162,000,000] [10:180,000.000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 660 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 660 is Thursday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/20 Friday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/30 Saturday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:   

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 355.6  Sol Number: 661  Change in degrees is +.5
Previous SL:      355.1  Previous Sol: 660

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   231,508,500 km Difference is +197773 <= 7879 km/hour at 8.5 on 01/30 (time:8:30)
Distance of Mars from the Sun is given by theskylive.com as:   231,310,727 km Difference is +176887 <= 7896 km/hour at 7.4 on 01/29 (time:7:24)
Distance of Mars from the Sun is given by theskylive.com as:   231,133,840 km Difference is +167723 <= 7949 km/hour at 9.0 on 01/28 (time:9:00)

Next up: Galaxy PGC 1512257 RA 2h 36m 02.6s Just below path Day 0 about 14 hours ahead
Next up: Bright star HIP 12075 Magnitude 8.27 Just above path Day 0 13 hours ahead
bright star: HIP 11920 Magnitude 9.52 Above path Day 1 about 7 hours behind ... likely last day for 11920

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth
Light travel time is between 9 and 10 minutes. Communications delay would be 18+ minutes round trip. [9:162,000,000] [10:180,000.000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 661 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 661 is Friday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/21 Saturday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/01/10 Sunday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:    We are about to enter the last week of the year on Mars.  It is unlikely the event will receive much notice on Earth.

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 356.1  Sol Number: 662  Change in degrees is +.5
Previous SL:      355.6  Previous Sol: 661

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   231,704,147 km Difference is +195647 <= 7857 km/hour at 9.4 on 01/31 (time:9:24)
Distance of Mars from the Sun is given by theskylive.com as:   231,508,500 km Difference is +197773 <= 7879 km/hour at 8.5 on 01/30 (time:8:30)
Distance of Mars from the Sun is given by theskylive.com as:   231,310,727 km Difference is +176887 <= 7896 km/hour at 7.4 on 01/29 (time:7:24)

Next up: Galaxy PGC 1516530 RA 2h 38m 28.2s just below path Day 0 about 20 hours ahead. Might be good for two days
Galaxy PGC 1512257 RA 2h 36m 02.6s Just below path Day 1 Abound 10 hours behind - last day for 1512257
Bright star HIP 12075 Magnitude 8.27 Just above path Day 1 13 hours behind - last day for 12075

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth
Light travel time is between 9 and 10 minutes. Communications delay would be 18+ minutes round trip. [9:162,000,000] [10:180,000.000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 662 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 662 is Saturday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/22 Sunday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/02/01 Monday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:    We are in the last week of the year on Mars.  It is unlikely the event will receive much notice on Earth.

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 356.6  Sol Number: 663  Change in degrees is +.5
Previous SL:      356.1  Previous Sol: 662

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   231,893,080 km Difference is +188933 <= 7840 km/hour at 9.5 on 02/01 (time:9:30)
Distance of Mars from the Sun is given by theskylive.com as:   231,704,147 km Difference is +195647 <= 7857 km/hour at 9.4 on 01/31 (time:9:24)
Distance of Mars from the Sun is given by theskylive.com as:   231,508,500 km Difference is +197773 <= 7879 km/hour at 8.5 on 01/30 (time:8:30)

Next up: Galazy 1522382 RA 2h 40m 55.4s in path Day 0  about 24 hours ahead - should be close to Mars tomorrow
Galaxy PGC 1516530 RA 2h 38m 28.2s just below path Day 1 about 6 hours behind ... last day for 530

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth
Light travel time is between 9 and 10 minutes. Communications delay would be 18+ minutes round trip. [9:162,000,000] [10:180,000.000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 663 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 663 is Sunday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/23 Monday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/02/02 Tuesday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:    Today is Groundhog's Day on Earth ... the date marks midway through Winter

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 357.1  Sol Number: 664  Change in degrees is +.5
Previous SL:      356.6  Previous Sol: 663

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   232,076,860 km Difference is +183780 <= 7820 km/hour at 9.0 on 02/02 (time:9:00)
Distance of Mars from the Sun is given by theskylive.com as:   231,893,080 km Difference is +188933 <= 7840 km/hour at 9.5 on 02/01 (time:9:30)
Distance of Mars from the Sun is given by theskylive.com as:   231,704,147 km Difference is +195647 <= 7857 km/hour at 9.4 on 01/31 (time:9:24)

Next up: Galaxy above path PGC 1524499 Day 0 about 6 yours ahead - may be visible tomorrow
Next Up: Bright star: HIP 12634 Magnitude 7.95 Below path Day 0 ahead about 12 hours ... should be visible tomorrow
Galazy 1522382 RA 2h 40m 55.4s in path Day 1 Right at Mars (just past) - may still be visible tomorrow

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth
Light travel time is between 10 and 11 minutes. Communications delay would be 20+ minutes round trip. [10:180,000.000] [11:198,000,000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 664 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 664 is Monday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. Per www.planetary.org this will occur February 7, 2021 (Year 36)
The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/24 Tuesday <<-- Days of the week are out of alignment with those on Earth.  Earth February 5, 2021 next alignment estimate.

Today on Earth: 2021/02/03 Wednesday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:    Approaching New Year's on Mars  Countdown: 4 Earth days 3 Martian Sols

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 357.6  Sol Number: 665  Change in degrees is +.5
Previous SL:      357.1  Previous Sol: 664

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   232,268,725 km Difference is +191865 <= 7799 km/hour at 9.6 on 02/03 (time:9:36)
Distance of Mars from the Sun is given by theskylive.com as:   232,076,860 km Difference is +183780 <= 7820 km/hour at 9.0 on 02/02 (time:9:00)
Distance of Mars from the Sun is given by theskylive.com as:   231,893,080 km Difference is +188933 <= 7840 km/hour at 9.5 on 02/01 (time:9:30)

Next up: Star TYC 1223-32-1 Magnitude 11.18 in path Day 0 about 18 hours ahead
Galaxy above path PGC 1524499 Day 1 Over 12 hours past - last day for 1524499
Bright star: HIP 12634 Magnitude 7.95 Below path Day 1 behind about 12 hours - last day for 12634

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth
Light travel time is between 10 and 11 minutes. Communications delay would be 20+ minutes round trip. [10:180,000.000] [11:198,000,000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 665 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 665 is Tuesday in the Proposed calendar for Mars.  <<== Skip day occurred November 22nd, 2020 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees.
Per www.planetary.org this will occur February 7, 2021 (Year 36)

The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/24 Tuesday <<-- Days of the week are out of alignment with those on Earth. 

Today on Earth: 2021/02/04 Thursday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:    Today was a Skip Day.  The date on Mars held at Sol 665 Year 35 Month 24 Sol 24

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 358.1  Sol Number: 665  Change in degrees is +.5 <<-- Skip Day on Mars
Previous SL:      357.6  Previous Sol: 665

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   232,451,536 km Difference is +182811 <= 7779 km/hour at 9.1 on 02/04 (time:9:06)
Distance of Mars from the Sun is given by theskylive.com as:   232,268,725 km Difference is +191865 <= 7799 km/hour at 9.6 on 02/03 (time:9:36)
Distance of Mars from the Sun is given by theskylive.com as:   232,076,860 km Difference is +183780 <= 7820 km/hour at 9.0 on 02/02 (time:9:00)

Next up: Star TYC 1226-1108-1 Magnitude 10.61 in path or just below Day 0 About 24 hours ahead - may last two days
Star TYC 1223-32-1 Magnitude 11.18 in path Day 1 about 6 hours behind - last day for 1223

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth
Light travel time is between 10 and 11 minutes. Communications delay would be 20+ minutes round trip. [10:180,000.000] [11:198,000,000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 665 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 665 is Tuesday in the Proposed calendar for Mars.  <<== Skip day occurred February 4, 2021 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees.
Per www.planetary.org this will occur February 7, 2021 (Year 36)

The next Skip Day will occur in February on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/25 Wednesday <<-- Days of the week are out of alignment with those on Earth. 

Today on Earth: 2021/02/05 Friday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:    We are in the last few Sols of the Martian year.

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 358.6  Sol Number: 666  Change in degrees is +.5 <<-- Skip Day on Mars
Previous SL:      358.1  Previous Sol: 665 <<== Skip Day on Mars

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   232,623,083 km Difference is +171502 <= 7760 km/hour at 7.2 on 02/05 (time:7:12)
Distance of Mars from the Sun is given by theskylive.com as:   232,451,536 km Difference is +182811 <= 7779 km/hour at 9.1 on 02/04 (time:9:06)
Distance of Mars from the Sun is given by theskylive.com as:   232,268,725 km Difference is +191865 <= 7799 km/hour at 9.6 on 02/03 (time:9:36)

Next up: Bright star HIP 13092 just below path Day 0 about 10 hours ahead
Star TYC 1226-1108-1 Magnitude 10.61 in path or just below Day 1 Just ahead of Mars - may be good for one more day

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth
Light travel time is between 10 and 11 minutes. Communications delay would be 20+ minutes round trip. [10:180,000.000] [11:198,000,000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 666 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 666 is Wednesday in the Proposed calendar for Mars.  <<== Skip day occurred February 4, 2021 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees.
Per www.planetary.org this will occur February 7, 2021 (Year 36)

The next Skip Day will occur in March on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/26 Thursday <<-- Days of the week are out of alignment with those on Earth. 

Today on Earth: 2021/02/06 Saturday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:    We are in the last week of Year 35 on Mars.   Today is Sol 667, one Sol before New Year's eve on Mars.

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 359.1  Sol Number: 667  Change in degrees is +.5 <<-- Skip Day on Mars
Previous SL:      358.6  Previous Sol: 666 <<== Skip Day on Mars

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   232,820,292 km Difference is +197254 <= 7735 km/hour at 8.7 on 02/06 (time:8:42)
Distance of Mars from the Sun is given by theskylive.com as:   232,623,083 km Difference is +171502 <= 7760 km/hour at 7.2 on 02/05 (time:7:12)
Distance of Mars from the Sun is given by theskylive.com as:   232,451,536 km Difference is +182811 <= 7779 km/hour at 9.1 on 02/04 (time:9:06)

Next up: Star TYC 1227-773-1 in path Day 0 about 20 hours ahead.  May be good for two days.
Bright star HIP 13092 just below path Day 1 about 15 hours behind - last day for 13092
Star TYC 1226-1108-1 Magnitude 10.61 in path or just below Day 2 still visible at edge of viewing window - last day for 1108

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth
Light travel time is between 10 and 11 minutes. Communications delay would be 20+ minutes round trip. [10:180,000.000] [11:198,000,000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 667 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 667 is Thursday in the Proposed calendar for Mars.  <<== Skip day occurred February 4, 2021 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees.
Per www.planetary.org this will occur February 7, 2021 (on Earth). The new Mars Year will be 36.

The next Skip Day will occur in March on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today on Mars: 0035/24/28 Saturday <<-- Days of the week are out of alignment with those on Earth.   <<== Skipped Friday due to End of Quarter

Today on Earth: 2021/02/07 Sunday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]

One day note:    We are in the last week of Year 35 on Mars.   Today is Sol 668, New Year's eve on Mars.

It is ** this ** Sol that performs the magic that makes the Mars Business Calendar superior to all others.  The length of the day is variable.

The length of the day is extended so that at the stroke of midnight, the Business Calendar is re-aligned with the Astronomical Calendar.

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

Martian Year: 35  Martian Month in 12 month format: 12 <<== The Astronomical month will increment when longitude reaches 360 degrees

Solar Longitude: 359.6  Sol Number: 668  Change in degrees is +.5 <<-- New Year's Eve on Mars
Previous SL:      359.1  Previous Sol: 667

Note that Solar Longitude measurement varies as a function of location in orbit. 

Note#2: https://theskylive.com/mars-tracker  This web site shows the astronomical position of Mars.
Minus prefix means Mars is approaching the Sun.  Perihelion occurred at Ls 253 on Sol 485 - Earth Date 2020/08/03
Plus prefix means Mars is moving away from the Sun. Aphelion will occur near 70 degrees Ls (per www.planetary.org)

Note: 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.

Distance of Mars from the Sun is given by theskylive.com as:   233,003,129 km Difference is +182837 <= 7715 km/hour at 8.4 on 02/07 (time:8:24)
Distance of Mars from the Sun is given by theskylive.com as:   232,820,292 km Difference is +197254 <= 7735 km/hour at 8.7 on 02/06 (time:8:42)
Distance of Mars from the Sun is given by theskylive.com as:   232,623,083 km Difference is +171502 <= 7760 km/hour at 7.2 on 02/05 (time:7:12)

Next Up: Star TYC 1227-974-1 Magnitude 11.77 just above path Day 0 about 24 hours ahead
Star TYC 1227-773-1 in path Day 1 just past Mars about six hours - 773 may be visible tomorrow but it is doubtful

Note: The curve of the path of Mars as seen against the background of stars is now a line trending upward and East as seen from Earth
Light travel time is between 10 and 11 minutes. Communications delay would be 20+ minutes round trip. [10:180,000.000] [11:198,000,000]

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.

Mars is executing the "Retrograde" movement as seen from Earth. Earth is passing "under" Mars.
Progress of Mars (as seen from Earth) is transitioning back to Eastward as the retrograde movement continues.
The online solar system display at the link below shows clearly how the Mars retrograde movement will occur in months ahead.
Retrograde movement started 2020/09/08 Sol 520

This web site offers an online model of the solar system: www.solarsystemscope.com  It requires Chrome 57, Firefox 52 or Safari 10.1

Sol 668 is in Month 24 of a Proposed 24 month calendar. See Post 19 of Holidays topic for a summary.
Month 24 extends from Sol 642 through 668. See post 82 of Holidays topic for current details. <<== There are 28 days in Month 22
Direct path to source: http://newmars.com/forums/viewtopic.php … 57#p154257
Sol 668 is Saturday in the Proposed calendar for Mars.  <<== Skip day occurred February 4, 2021 on Earth

The Next New Year's on Mars will occur when Solar Longitude reaches 360 degrees. <<== This is New Year's Eve on Mars
Per www.planetary.org this will occur February 7, 2021 (on Earth). The new Mars Year will be 36.

The next Skip Day will occur in March on Earth. A Skip Day occurs when the longer Mars Sol accumulates 24 Earth hours.
For those who may be following this proposed calendar closely, there exists a "feature" I had not anticipated.
Days of the week fall behind Earth due to the longer Sol, but they gain when Friday is omitted at the end of a Quarter
337 Earth days were observed to elapse in the 2020 weekday cycle. There were 7 week day transitions and 2 Quarter ends.

For current weather on Mars at Insight location, see:
https://mars.nasa.gov/insight/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

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

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

Sunday         642 649 656 663
Monday        643 650 657 664
Tuesday       644 651 658 665
Wednesday  645 652 659 666
Thursday      646 653 660 667
Friday          647 654 661 <<== Skipping Friday because Last Week of Quarter 4
Saturday      648 655 662 668 <<== This day will be extended in length to complete the year

tahanson43206

Moderator

Registered: 2018-04-27

Posts: 19,441

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

Today is New Year's Eve on Mars

This is the last Sol of Year 35 in the Astronomical Calendar SearchTerm:J0035668

In the business calendar, the last Sol of the Year has a variable length designed to re-align the business calendar with the Astronomical calendar at the stroke of midnight.  This Business Calendar followed by the NewMars forum over the entire Year 35 progress of Mars around the Sun is proven to be simple, reliable and free of the need for tweaks, as is the case with the common Calendar for Earth.

Today on Mars: 0035/24/29 Saturday <<-- Days of the week are out of alignment with those on Earth.   <<== Skipped Friday due to End of Quarter
Today on Earth: 2021/02/07 Sunday (Earth Date) Title: Today on Mars   [Perihelion occurred August 3, 2020 Earth Calendar]
One day note:    We are in the last week of Year 35 on Mars.   Today is Sol 668, New Year's eve on Mars.
It is ** this ** Sol that performs the magic that makes the Mars Business Calendar superior to all others.  The length of the day is variable.
The length of the day is extended so that at the stroke of midnight, the Business Calendar is re-aligned with the Astronomical Calendar.

I'd like to once again thank RobertDyck for the suggestions that allow this calendar to be worthy of consideration for use by Mars settlers.

To summarize ...

Given a year of 668 Sols, this calendar has 24 months of 28 Sols, divided into quarters that skip Friday in the last week of each quarter.

Sol 668 is allowed a variable length to achieve re-alignment with the Astronomical Calendar at the stroke of midnight.

Edit 2021/02/21 Earth Time: It appears that the French web site that is the reference for these reports may have performed a reset in the transition from Year 35 to Year 36.  The Skip Day expected in March (on Earth) came early, on Sol 11.

(th)

SpaceNut

Administrator

From: New Hampshire

Registered: 2004-07-22

Posts: 29,433

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

Well that snuck up on me quick and its hard to believe we have made it though a mars year....

The calendar is a first step for seasons and so much more that we will write once we are there.

So thinking about going to mars starts with after you have planned the rocket and manifest, landing site plus science to do, we have set out on the planned trip launch date to make it a reality. So off to Orbital mechanics to post about just that.