If it's a satelite thread, then you have to be very careful to throw the BS in all directions equally.
If you throw it only in the direction you're heading, you'll slow down and crash into the accreating mass of Moab, and if you throw it 180 degrees the other way, you'll eventually build up escape velocity and hurtle randomly across the sky, and end up in the music threads.

Boys own book of 101 fun, safe and informative things to do with a planetesimal and a mass driver. Pub. BGC, FBI and freinds.