Schjellerup (crater)

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Schjellerup
Schjellerup crater LROC polar mosaic.jpg
LRO mosaic
Coordinates 69°42′N157°06′E / 69.7°N 157.1°E / 69.7; 157.1 Coordinates: 69°42′N157°06′E / 69.7°N 157.1°E / 69.7; 157.1
Diameter 62 km
Depth Unknown
Colongitude 205° at sunrise
Eponym Hans C. F. C. Schjellerup
Oblique Lunar Orbiter 5 image, facing west Schjellerup crater 5053 med.jpg
Oblique Lunar Orbiter 5 image, facing west

Schjellerup is a lunar impact crater that is located in the far northern latitudes on the Moon's far side. This crater lies to the southwest of the larger Karpinskiy, and to the northeast of Gamow. To the northwest of Schjellerup is the crater Seares and to the south-southeast lies Avogadro.

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 reasonably well-preserved crater that has undergone only a marginal degree of wear from subsequent impacts. The most notable overlapping impact is a cup-shaped crater along the north-northwestern inner wall. The crater is otherwise free from impacts of note. The rim edge is well-defined and the inner walls have terrace features. The interior floor is relatively level with the exception of some low hills clustered around the midpoint.

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 Schjellerup.

SchjellerupLatitudeLongitudeDiameter
H68.5° N167.4° E21 km
J68.1° N161.4° E37 km
N66.6° N154.3° E38 km
R68.7° N152.2° E54 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.