Challis (crater)
Location of the crater Challis.
Coordinates	79°30′N 9°12′E / 79.5°N 9.2°E / 79.5; 9.2Coordinates: 79°30′N 9°12′E / 79.5°N 9.2°E / 79.5; 9.2
Diameter	56 km
Depth	Unknown
Colongitude	355° at sunrise
Eponym	James Challis

Challis is a lunar crater that is located in the northern regions of the Moon's near side, close enough to the limb to appear significantly foreshortened when viewed from the Earth. It is joined to the crater Main through a break in the northern rim, and is close to Scoresby along the southeast side.

The rim of this crater has been damaged and eroded by a history of impacts, with the most intact portion located along the southeastern half. A small crater lies across the southern rim, and the remaining rim is notched and irregular. The interior floor of both Challis and Main have been resurfaced forming a relatively level bottom common to both formations. This surface is marked only by multiple tiny craterlets.

Satellite craters [link]

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 Challis.

Challis	Latitude	Longitude	Diameter
A	77.2° N	2.3° E	32 km

References [link]

Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
Blue, Jennifer (July 25, 2007). "Gazetteer of Planetary Nomenclature". USGS. https://planetarynames.wr.usgs.gov/. Retrieved 2007-08-05.
Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.
Cocks, Elijah E.; Cocks, Josiah C. (1995). Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature. Tudor Publishers. ISBN 978-0-936389-27-1.
McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. https://host.planet4589.org/astro/lunar/. Retrieved 2007-10-24.
Menzel, D. H.; Minnaert, M.; Levin, B.; Dollfus, A.; Bell, B. (1971). "Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU". Space Science Reviews 12 (2): 136–186. Bibcode 1971SSRv...12..136M. DOI:10.1007/BF00171763. edit
Moore, Patrick (2001). On the Moon. Sterling Publishing Co. ISBN 978-0-304-35469-6.
Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 978-0-521-33500-3.
Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 978-0-913135-17-4.
Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes (6th revision ed.). Dover. ISBN 978-0-486-20917-3.
Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 978-0-521-62248-6.
Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.

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Crater

Crater may refer to:

In landforms:

Impact crater, caused by two celestial bodies impacting each other, such as a meteorite hitting a planet

Volcanic crater or caldera, formed by volcanic activity

Subsidence crater, from an underground (usually nuclear) explosion

A maar crater, a relief crater caused by a phreatic eruption or explosion

pit crater, a crater that forms through sinking of the surface and not as a vent for lava

Crater lake

Explosion crater, a hole formed in the ground produced by an explosion near or below the surface

Machtesh, a crater-like formation created by erosion.

Other:

Crater, California, in Inyo County

Cratering, when reindeer dig for lichens that sustain them in winter months

Crater (constellation)

Joseph F. Crater, a New York judge who disappeared in 1930

An alternate ancient name for the Crathis, a river of southern Italy

Crater (Yemen)

The Crater (novel) a book by James Cooper

Crater Exploration New Space services company.

Crater, a 2016 collaborative album between Mamiffer and Daniel Menche

Crater (Aden)

Crater (/ˈkreɪtər/; Arabic: كريتر‎, [ˈkɾeːtəɾ]), also Kraytar, is a district of the Aden Governorate, Yemen. Its official name is Seera (Arabic: صيرة Ṣīrah). It is situated in a crater of an ancient volcano which forms the Shamsan Mountains. In 1991, the population was 70,319. As of 2003, the district had a population of 76,723 people.

In the closing days of British rule in 1967, Crater District became the focus of the Aden Emergency, sometimes called the last imperial war. After a mutiny of hundreds of soldiers in the South Arabian Federation Army on 20 June, all British forces withdrew from the Crater. The Crater was occupied by Arab fighters while British forces blocked off its two main entrances. In July, a British infantry battalion, led by Lt. Col. Colin Mitchell of the Argyll & Sutherland Highlanders, entered the Crater and managed to occupy the entire district overnight with no casualties. Nevertheless, deadly guerrilla attacks soon resumed, with the British leaving Aden by the end of November 1967, earlier than had been planned by British Prime Minister Harold Wilson and without an agreement on the succeeding governance.

Crater (Chinese astronomy)

According to traditional Chinese uranography, the modern constellation Crater is located within the southern quadrant of the sky, which is symbolized as the Vermilion Bird of the South (南方朱雀, Nán Fāng Zhū Què).

The name of the western constellation in modern Chinese is 巨爵座 (jù jué zuò), meaning "the huge wine holder constellation".