Geological Chronicle
Langemak is a prominent impact crater on the far side of the Moon, measuring 104.76 kilometers in diameter. Located nearly due east of Meitner and less than one crater diameter west-northwest of Danjon, the formation partly overlies the older and larger crater Langemak N. Ray material cast from the crater Necho to the northeast crosses Langemak's rim and interior floor, particularly across its northwest and eastern halves.
The outer rim is relatively fresh and well-defined, showing an irregular circular outline with multiple small outward bulges. Along the southwestern edge, the small crater Sherrington interrupts the rim. The inner wall is terraced in places, with the appearance of slumping along portions of the upper edge.
Within the interior, a low, curving central ridge rises near the midpoint, bordered to the southwest by a patch of lower-albedo material that reaches the edge of the inner wall. Before the International Astronomical Union officially named the crater in 1970 in honor of Soviet rocketry scientist Georgy Langemak, it was designated Crater 279.