This was great! Well written and laid out simply enough to get your head around once you go through everything a few times. Good work!
[SPOILERS]
I also got stuck with the code, and even with the hints I still couldn't get it. I knew the planet was at 2914 and they had been travelling for 28(?) days since they left that planet, but I assume I need to figure out the location of Earth, and I can't find the clues to do that. I'm probably just missing something or didn't reread something properly. Since so many people got stuck, maybe it's worth adding an extra clue or tweaking the puzzle a bit. Up to you, of course! No idea if the other guesses I made were correct because obviously you can't see until you submit them all, which is probably pretty standard but tough when there's just one thing you can't figure out. Honestly great work though even with that frustration!