Reimarus (crater)

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Reimarus
Reimarus crater 4059 h1 h2.jpg
Coordinates 47°42′S60°18′E / 47.7°S 60.3°E / -47.7; 60.3 Coordinates: 47°42′S60°18′E / 47.7°S 60.3°E / -47.7; 60.3
Diameter 48 km
Depth 2.7 km
Colongitude 301° at sunrise
Eponym N. Reymers Bär

Reimarus is a lunar impact crater, located in the southeastern part of the Moon's near side. The eroded southeastern end of the long Vallis Rheita (Rheita valley) passes just to the west. To the northeast is the larger and heavily worn crater Vega.

Lunar craters

Lunar craters are impact craters on Earth's Moon. The Moon's surface has many craters, almost all of which were formed by impacts.

Impact crater Circular depression on a solid astronomical body formed by a hypervelocity impact of a smaller object

An impact crater is an approximately circular depression in the surface of a planet, moon, or other solid body in the Solar System or elsewhere, formed by the hypervelocity impact of a smaller body. In contrast to volcanic craters, which result from explosion or internal collapse, impact craters typically have raised rims and floors that are lower in elevation than the surrounding terrain. Impact craters range from small, simple, bowl-shaped depressions to large, complex, multi-ringed impact basins. Meteor Crater is a well-known example of a small impact crater on Earth.

Moon Earths natural satellite

Earth's Moon is an astronomical body that orbits the planet and acts as its only permanent natural satellite. It is the fifth-largest satellite in the Solar System, and the largest among planetary satellites relative to the size of the planet that it orbits. The Moon is, after Jupiter's satellite Io, the second-densest satellite in the Solar System among those whose densities are known.

This is a heavily worn and eroded crater, with an outer rim that has been incised and battered by multiple lesser, later impacts, particularly in the western half. Several small craterlets lie along the rim edge and the inner walls, and the outer rise is generally uneven and rugged. On the southwest part of the interior floor is a small crater. The remainder of the floor is generally featureless and 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 midpoint that is closest to Reimarus.

ReimarusLatitudeLongitudeDiameter
A48.8° S59.9° E29 km
B49.5° S60.6° E16 km
C50.2° S59.5° E11 km
F49.5° S58.7° E7 km
H49.3° S62.3° E10 km
R47.7° S63.9° E35 km
S47.8° S62.8° E9 km
T48.4° S63.5° E24 km
U48.5° S62.2° E20 km

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References

Ewen Whitaker British astronomer

Ewen Adair Whitaker was a British-born astronomer who specialized in lunar studies. During World War II he was engaged in quality control for the lead sheathing of hollow cables strung under the English Channel as part of the "Pipe Line Under The Ocean" Project (PLUTO) to supply gasoline to Allied military vehicles in France. After the war, he obtained a position at the Royal Greenwich Observatory working on the UV spectra of stars, but became interested in lunar studies. As a sideline, Whitaker drew and published the first accurate chart of the South Polar area of the Moon in 1954, and served as director of the Lunar Section of the British Astronomical Association.

NASA space-related agency of the United States government

The National Aeronautics and Space Administration is an independent agency of the United States Federal Government responsible for the civilian space program, as well as aeronautics and aerospace research.

United States Geological Survey Scientific agency of the United States government

The United States Geological Survey is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization has four major science disciplines, concerning biology, geography, geology, and hydrology. The USGS is a fact-finding research organization with no regulatory responsibility.