Hoffmeister is a lunar impact crater that is located , to the northwest of the huge walled plain Mendeleev. Some distance to the north lies the crater Siedentopf, and to the west-northwest is Gavrilov. This is a somewhat eroded crater with Hoffmeister N attached to the southern rim. A small crater with a high albedo lies along the common 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.