Carbon Fiber Net
Trying to shoot something in space with a simple projectile is stupid. Calculate, match, then , Send a carbon fiber net from a higher orbit down. Small light easy to deploy. You can make the net *BIG* say 10CM squares, with hair size strands.1/2 klick square deployed.
Best case you drag the mess into the gravity well. Worst you slice it into 10cm bricks, hopefuly tumbling earthward, and your net burns up on the way down.