Van Albada is a lunar crater that is attached to the south-southeastern rim of Auzout. It lies southeast of Mare Crisium, and north-northeast of the larger crater Firmicus. Directly to the east is Krogh. While the perimeter is generally circular, there is a slight outward bulge in the rim to the northwest, and a smaller crater lies across the eastern rim. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.