Wikipedia
Perel'man (crater)
Perel'man is a worn impact crater that lies on the Moon's far side. It is located less than one crater diameter to the northwest of the prominent crater Scaliger. To the west-southwest is the elongated Bowditch. Southwest of Perel'man is a small lunar mare that has been named Lacus Solitudinis.
This crater is generally unremarkable. It is worn and eroded with an uneven outer rim. The satellite crater Perel'man E is attached to the eastern exterior. The crater is free of significant overlapping impacts. There is a low ridge near the midpoint of the interior floor.