Western Europa
Joined: Mar 29, 2014
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Re: 2040 : Mars Two
A little pedagogy today, we will approach astronautics...
Calculations for a Martian launch: A little physics, let us remember these data:
Postulate: Let's take 2 digits after the comma Terre = Earth = blue Mars = red A real case: Mars Pathfinder Therefore, with the hypothesis of a circular orbit and in the same plane (Less precise approximation for Mars than for Earth).
Departure on December 4, 1996 Picture from Celestia
Arrival 7 months after (212 days) on July 4, 1997
Instant of launching : But where should Mars be on launch day ? Mars achieves a full 360° orbit in 1.88 years (or 687.67 days).  Formula: Circle × ((DS / DE) / PM) where: Circle (in Deg) = 360 DS = Travel time in days DE = One terrestrial year in days = 365.25 days PM = Relative Martian period in terrestrial year = 1.88 this gives : => 360 x ((212 / 365.25) / 1.88) = 111°14 for Pahtfinder => 360 x ((180 / 365.25) / 1.88) = 94°40 for Mars II  We can calculate the relative position of the Earth and Mars. 180° - 111°14 = 68°85 for Pathfinder (validated by first picture) 180° - 94°40 = 85°60 for Mars II  Thus, launches are only possible when the Earth is located at 85°60 Behind the planet Mars (for Mars II in 2039).  For Mars II Departure around june 10th 2039 (+/- 1 day) The picture from Celestia gives the positions of Earth and Mars at the time of departure.
Arrival around Dec 07th 2039 (+/- 1 day) near 2040... The picture gives the positions of the Earth and Mars at the moment of arrival.
The calculations will be the same for Mars III. When do you think that Mars III will arrive on Mars ? I wait your answers (with average of + or - 2 days)...
The winner will become one of passengers of the next mission.
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Evil progresses when good people do nothing! --- SH3D 7.1 and nothing else - W11 64b in 4K
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Evil progresses when good people do nothing! --- SH3D 7.1 and nothing else - W11 64b in 4K
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[Edit 1 times,
last edit by bdfd at Jan 15, 2017, 7:37:26 AM]
Western Europa
Joined: Mar 29, 2014
Post Count: 2614
Status:
Offline
Re: 2040 : Mars Two
D 704 ( Nov 01st 2041 )
After 283 martian days (on 300 planified : 5 x 60), the 'village' is near finished.
1920 x 1080 in Q4 reduced in 1024 x 768
During this time, The second crew is gone from Earth on July 04th 2041 => good date for US members , it's the answer of the calculates HERE ).
With new engines, Mars III does its Journey in 130 days instead of 180 for Mars II... So Mars III arrives in 10 days !!!
I have technical problem with Mediafire site, so temporarly, I'm at imgbox and the pictures are sometimes entire...
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Evil progresses when good people do nothing! --- SH3D 7.1 and nothing else - W11 64b in 4K
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[Edit 4 times,
last edit by bdfd at Jan 22, 2017, 7:56:30 AM]
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Evil progresses when good people do nothing! --- SH3D 7.1 and nothing else - W11 64b in 4K
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[Edit 1 times,
last edit by bdfd at Jan 27, 2017, 8:59:55 AM]
