Formed in a collision 80 million years ago, the Baptistina family of asteroids is thought to have caused a large spike in the impact rate. Note that the rate of impact cratering in the outer Solar ...
"Among the flyby targets are (623) Chimaera, the largest remnant of the primitive C-type Chimaera family, and members of the Baptistina, Eos, Erigone, and Euterpe families. "Five of the seven ...