Create a camp, you will be there for awhile, harvest scraps from the ship to make shelter. Wander small ways from the camp, now fully built, to find anything else. Test the radio systems. If they work, send a call and continue. If they don't, make a larger fire than the ship to try to get a signal out. Once they arrive, make sure they are friendly (you never cleared this out) and do NOT leave the asteroid until you confirm it.