Krasnov is a lunar impact crater that is located in the southeastern part of the Montes Cordillera range, near the southwest limb. From the Earth this crater appears foreshortened, and visibility can be affected by libration. To the north is the crater Eichstadt and to the southwest is Shaler, both along the edge of the Montes Cordillera mountain ring. The rim of this crater is sharp-edged and not notably worn. (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.