Chamberlin is a lunar

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...

 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...

 that is located 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...

, just past the southeastern limb. It lies to the southeast of the crater Jeans

Jeans (lunar crater)

Jeans is a lunar crater along the southeastern limb of the Moon. The majority of this formation lies on the far side with respect to the Earth, but favorable librations can bring the entire crater into view...

, and Moulton

Moulton (crater)

Moulton is a crater on the Moon's far side, just beyond the south-southwestern limb as seen from the Earth. The crater is attached to the southern edge of Chamberlin, and it lies at the northern terminus of the Vallis Schrödinger valley. There is a cleft in the shared rim between Chamberlin and...

 is attached to the southeastern rim of Chamberlin. This crater is located in a part of the lunar surface that has undergone resurfacing of crater interiors, producing dark-hued crater floors.

The outer rim of this formation is somewhat irregular in shape, with outward bulges to the east and southeast. The southern rim has partly disintegrated, and merges with the northwest rim of Moulton. The interior floor of Chamberlin has been flooded by basalt

Basalt

Basalt is a common extrusive volcanic rock. It is usually grey to black and fine-grained due to rapid cooling of lava at the surface of a planet. It may be porphyritic containing larger crystals in a fine matrix, or vesicular, or frothy scoria. Unweathered basalt is black or grey...

ic lava

Lava

Lava refers both to molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling. This molten rock is formed in the interior of some planets, including Earth, and some of their satellites. When first erupted from a volcanic vent, lava is a liquid at...

, producing a nearly flat surface with a 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...

than the typical lunar surface. The interior is otherwise devoid of features of interest, and is marked only by a few tiny craterlets.

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 Chamberlin.

Chamberlin	Latitude	Longitude	Diameter
D	57.5° S	102.1° E	21 km
H	59.8° S	99.9° E	27 km
R	60.0° S	92.3° E	38 km