Langemak is a prominent impact crater

Impact crater

In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...

 on the far side of the Moon

Moon

The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...

. It is located less than one crater diameter west-northwest of Danjon

Danjon (crater)

Danjon, is a lunar crater on the far side of the Moon. It lies less than a crater diameter to the east-southeast of the larger crater Langemak. To the east-northeast of Danjon is the crater Perepelkin, and due south lies the walled plain Fermi....

, and nearly due east of Meitner

Meitner (lunar crater)

Meitner is an impact crater on the far side of the Moon, behind the eastern limb. It lies to the northwest of the crater Kondratyuk, and about a crater diameter to the west of Langemak....

. To the southwest of Langemak is Kondratyuk

Kondratyuk (crater)

Kondratyuk is a worn crater on the Moon's far side. It is located to the west-northwest of the large walled plain Fermi, and to the northeast of the crater Hilbert. To the north-northwest is Meitner, and to the northeast lies Langemak....

. Langemak partly overlies the larger and older crater Langemak N. This feature is also attached to the northeastern rim of Kondratyuk.

To the northeast of Langemak is the crater Necho

Necho (crater)

Necho is a lunar impact crater on the far side of the Moon, and therefore cannot be seen directly from the Earth. It lies to the northeast of the larger crater Langemak, and about a crater diameter to the south-southwest of Bečvář....

, an impact feature that lies at the locus of a bright ray system

Ray system

A ray system comprises radial streaks of fine ejecta thrown out during the formation of an impact crater, looking a bit like many thin spokes coming from the hub of a wheel. The rays can extend for lengths up to several times the diameter of their originating crater, and are often accompanied by...

. Ray material from this impact lies across the rim and interior of Langemak, particularly along the northwest and eastern halves.

The outer rim of Langemak is relatively fresh and well-defined. The most notable impact along the rim is the small crater Sherrington

Sherrington (crater)

Sherrington is a small lunar crater that intrudes into the southwest outer rim of the much larger crater Langemak. To the south-southwest is Kondratyuk. Sherrington is located on the Moon's far side and it cannot be viewed directly from the Earth....

 along the southwestern edge. The remainder of the rim is roughly circular, but irregular with multiple small outward bulges. The inner wall is terraced in places, with the appearance of slumping along parts of the upper edge.

Within the interior is a low, curving central ridge near the mid-point. There is a patch of lower albedo

Albedo

Albedo , or reflection coefficient, is the diffuse reflectivity or reflecting power of a surface. It is defined as the ratio of reflected radiation from the surface to incident radiation upon it...

material to the southwest of this ridge, extending to the edge of the inner wall.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater mid-point that is closest to Langemak.

Langemak	Latitude	Longitude	Diameter
N	12.9° S	119.0° E	126 km
X	6.6° S	117.5° E	47 km
Z	5.6° S	119.3° E	27 km