The answer is no. Hubble's visible-light resolution is about 0.05 arcseconds, which translates to 90 metres per pixel, far too large to make out anything that's

The answer is no. Hubble's visible-light resolution is about 0.05 arcseconds, which translates to 90 metres per pixel, far too large to make out anything that's "merely" bus sized. An imager would need to in orbit around the moon to have any reasonable chance. It seems like they're hoping to detect the plume of dust caused by the collision, however.