Amundsen is a large lunar 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...

 located near the south pole 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...

, named after the Norwegian explorer Roald Amundsen

Roald Amundsen

Roald Engelbregt Gravning Amundsen was a Norwegian explorer of polar regions. He led the first Antarctic expedition to reach the South Pole between 1910 and 1912 and he was the first person to reach both the North and South Poles. He is also known as the first to traverse the Northwest Passage....

. It lies along the southern lunar limb, and so is viewed from the side by an observer on the Earth

Earth

Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...

. To the northwest is the crater Scott

Scott (crater)

Scott is a lunar impact crater near the south pole of the Moon. Its location close to the lunar limb hinders observation, both from the foreshortening of the crater as seen from Earth and from the limited sunlight that enters the basin. In fact the northern end of this crater is in near perpetual...

, a formation of similar dimensions that is named for another Antarctic

Antarctic

The Antarctic is the region around the Earth's South Pole, opposite the Arctic region around the North Pole. The Antarctic comprises the continent of Antarctica and the ice shelves, waters and island territories in the Southern Ocean situated south of the Antarctic Convergence...

 explorer. Nobile

Nobile (crater)

Nobile is a lunar crater that is located near the southern pole of the Moon. It lies to the south of the crater Scott, along the western rim of Amundsen. Between Nobile and the southern pole lie the smaller craters Shoemaker and Faustini....

 is attached to the western rim.

The rim of Amundsen is slightly distended along the southern edge, and the terraced inner surface is wider at that point than elsewhere along the outer wall. The crater overlaps a smaller crater formation to the northwest, and Amundsen A is attached to the northern rim. Just to the south of Amundsen is the smaller crater Faustini

Faustini (crater)

Faustini is a lunar crater that lies near the south pole of the Moon. It is located nearly due south of the much larger crater Amundsen, and is almost attached to Shoemaker to the southwest. About one crater diameter due south is the smaller crater Shackleton at the south pole...

.

The inner floor is relatively flat, with a pair of central peaks near the mid-point. Much of the crater floor is cloaked in shadow during the lunar day, with only the southern floor and the central peaks receiving sunlight.

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 Amundsen.

Amundsen	Latitude	Longitude	Diameter
A	81.8° S	83.1° E	74 km
C	80.7° S	83.2° E	27 km