If it's 642m in dia, I'd geuss that it wouldn't fit and we'd have to acquit.
Well, first of all, the asteroid is about 390m wide, which is smaller than the keyhole. Second, I neglected to fully detail that it is the center mass of the asteroid, and not the asteroid in its entirety, that would have to pass through the keyhole in order for its trajectory to become, well, problematic.