Story line I'm working on: an iron asteroid--huge, 20 km in diameter--is zipping along in its orbit in the asteroid belt. It's solid Ni-Fe, same composition as an iron meteorite, only gigantic. I need to have its velocity slowed down. 900 gees of de-acceleration for 10 seconds. Can this mass survive without breaking up? It is solid iron, after all. Thanks for any input. Guesses too.