For not mention the AI unnable to handle that..
Apart, StarFurys Aurora and Badger cant handle atmosferic flight, Thunderbolts, Nials, Frazys and the crap raider thing can. That asteroid doesnt appear enought big to create a notable gravity field wich couldnt be compensated by inflight computers.
For example there is an episode where two starfuries match the station rotation perfectly, in the Lurker guide JMS or someone said starFuries have 250 year more advanced computers than now, they can auto-compensate rotations and other things, like small gravities to allow pilot concentrate in their job