So with that launch velocity it would be able to launch from orbit, and it would reach the surface of the Earth. If humans don't try to stop it, it'll (more or less, with the variance of wind which while it could be calculated in like normal artillery firing, but I'd imagine it'd be too complex to entirely account for at that altitude) hit target. However it'll be easy to aim for and take out by modern developed nations.
Am I more or less on target with that summary of points?