It depends on the depth of a crater. A 15-20 mile deep crater would get you to Mt. Everest levels of density. Of course, that kind of a crater would require a

It depends on the depth of a crater. A 15-20 mile deep crater would get you to Mt. Everest levels of density. Of course, that kind of a crater would require a direct impact from an object of this size, not a glancing impact.