>>513836295
You do understand that the sun's rays will melt things that have been at almost absolute zero for millennia on that asteroid, and heat them up to boiling point.
And since the velocity of everything on that asteroid is 0mph relative to everything else on that asteroid, anything that boils will mist away from the rock, towards the thing that's causing its surface to boil.
Creating a very large cloud of 'steam', because there's no atmosphere and very little gravity
This is something the average 10 year old is able to grasp by reading Greg Bear or Arthur C Clarke or Larry Niven, and yet here you are, dumber than a 10 year old.