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Forum » SpaceEngine » Science and Astronomy Discussions » NASA recreation of the famous Apollo 8 Earthrise photo (Using what's known of the event, and new LRO lunar data)
NASA recreation of the famous Apollo 8 Earthrise photo
pebbleDate: Sunday, 22.12.2013, 05:58 | Message # 1
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This short documentary about the circumstances surrounding the taking of the famous Earthrise photo is pretty fascinating.

Because the video includes very precise time/position information I tried to recreate it using Space Engine. Unfortunately I couldn't get a perfect match, I had to adjust the latitude a little and the longitude a lot (roughly equivalent to skipping ahead in the orbit a bit). But what I got after a little fudging is damned close to the actual photo. Notice the Earth is in exactly the right orientation, with Africa on the terminator.



And here is the same picture with position information.

for comparison, here's one of the actual photos:



If you want to cut and paste the saved location, use this. I think that works, I've never done it myself.

Place "Apollo 8 Earthrise - yet another approx"
{
Body "Moon"
Parent "Earth-Moon"
Pos (-4.851957621484007e-011, -3.117566084844328e-011, -1.528268803825325e-011)
Rot (0.4354673060507831, -0.1841364446287674, -0.2359672377234427, 0.8489884909947362)
Date "1968.12.24 16:39:17.45"
Vel 2.8306346e-012
Mode 1
}
 
DisasterpieceDate: Sunday, 22.12.2013, 06:57 | Message # 2
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That's pretty cool, and the end product is close too.




I play teh spase engien
 
WatsisnameDate: Monday, 23.12.2013, 15:33 | Message # 3
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Quote pebble ()
Unfortunately I couldn't get a perfect match, I had to adjust the latitude a little and the longitude a lot (roughly equivalent to skipping ahead in the orbit a bit).


SpaceEngine currently has a simple Keplerian orbit for the Moon whereas in reality the orbit is extremely complicated. So in recreating Earthrise, the Earth should be in the correct position and orientation but the Moon will be off a little bit, hence the fudging required.

It would be neat to try this in Orbiter too, since it had a more accurate treatment of its orbit. smile





 
pebbleDate: Tuesday, 24.12.2013, 04:04 | Message # 4
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Quote Watsisname ()
SpaceEngine currently has a simple Keplerian orbit for the Moon whereas in reality the orbit is extremely complicated. So in recreating Earthrise, the Earth should be in the correct position and orientation but the Moon will be off a little bit, hence the fudging required.


Oh, neat! I figured it was something like that. Amazing that it came out so close anyway.

Added (24.12.2013, 07:04)
---------------------------------------------

Quote Watsisname ()
SpaceEngine currently has a simple Keplerian orbit for the Moon whereas in reality the orbit is extremely complicated. So in recreating Earthrise, the Earth should be in the correct position and orientation but the Moon will be off a little bit, hence the fudging required.


Oh, neat! I figured it was something like that. Amazing that it came out so close anyway.
 
Forum » SpaceEngine » Science and Astronomy Discussions » NASA recreation of the famous Apollo 8 Earthrise photo (Using what's known of the event, and new LRO lunar data)
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