I'm not an expert in orbital dynamics, but (logically) if the point of impact is low enough that it's within a high-drag area of space, then any orbits generate

I'm not an expert in orbital dynamics, but (logically) if the point of impact is low enough that it's within a high-drag area of space, then any orbits generated by the impact must have that point as part of their orbits, therefore all pieces after the collision should decay eventually as well.