Crocco is a lunar crater on the far side from the Earth. It is located to the northeast of the huge walled plain Planck, and northwest of the equally huge Poincaré. Just to the north, within one crater diameter, is the crater Koch. This is a nearly circular crater formation whose eastern rim has been partly overlain by the satellite crater Crocco G. The rim has received some erosion, but it retains a well-defined edge. (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.