Lundmark (crater)

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Lundmark
Lundmark LROC.jpg
LRO image
Coordinates 39°42′S152°30′E / 39.7°S 152.5°E / -39.7; 152.5 Coordinates: 39°42′S152°30′E / 39.7°S 152.5°E / -39.7; 152.5
Diameter 106 km
Depth unknown
Colongitude 209° at sunrise
Eponym Knut Lundmark

Lundmark is an eroded crater on the far side of the Moon. It lies to the southwest of the Mare Ingenii, one of the rare mare areas on the far side. Nearly attached to the southwestern outer rim of Lundmark is the crater Koch, and located to the northwest is the flooded Jules Verne.

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.

Mare Ingenii lunar mare

Mare Ingenii is one of the few lunar mare features on the far side of the Moon. The mare sits in the Ingenii basin, which is of the Pre-Nectarian epoch, which lies in turn in the outer part of the older and much larger South Pole–Aitken basin. The mare material located in Ingenii and the surrounding craters is of the Upper Imbrian epoch. The dark circular feature which dominates this mare is the crater Thomson, with the overflow from Ingenii/Thomson directly to the east. Mare Ingenii is incompletely and thinly covered over much of its expanse with mare lava sheets. The light grey crater to the south of Mare Ingenii is Obruchev.

Contents

It is a heavily worn and damaged crater formation that is marked by a number of smaller craters along the sides and interior. The satellite crater Lundmark B overlies the north-northeastern rim, and Lundmark D lies across the eastern rim. There is a cluster of several small craterlets in the southeastern interior floor, and another grouping of craters in the uneven terrain between Lundmark and Koch.

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 Lundmark.

LundmarkLatitudeLongitudeDiameter
B37.7° S153.2° E30 km
C35.8° S155.6° E25 km
D38.8° S154.3° E29 km
F39.4° S157.2° E26 km
G40.5° S155.5° E35 km

See also

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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.