TRAVELLER RPG Clip: My players dealing with an asteroid field

I ran 25 sessions of a TRAVELLER tabletop science-fiction roleplaying game campaign on the Roll20 game teleconference site, trying to make the best use of Roll20's features. In Session 14, the player-characters had a misjump and came out of Jump space one orbit off from where they wanted to be, landing in an asteroid field with an unforgiving difference in velocity. I decided on some dice-rolling rules to give them 4 rounds to fend off the effects.