Peters is a small lunar crater in the north-northeastern part , lying in the gap. Due south is the crater Moigno. This is not a particularly prominent feature, having a low rim and an interior floor that has been almost completely submerged by lava flows. The rim is circular and only lightly worn, with a notch along the southeast. (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.