i thought starlink was using a low orbit that separated it from most other objects and would cause relatively rapid decay of debris. are there other objects in that orbit we should care about?
Starlink satellites are initially launched into such orbits, then use their built-in thrusters to raise themselves to somewhat higher orbits.
If somebody's launching "blow up a box full of BBs" weapons into orbit...their ability to control even the initial orbits of all those BBs will be kinda limited. (But if 10% of a million BBs go where you wanted 'em to - probably good enough, eh?)
BBs with lower perigees may fall out of orbit within days - but that's plenty of time to hit something, if a particular orbit was being targeted.
