Chapman (crater)

Chapman
	LRO image
Coordinates	50°24′N100°42′W / 50.4°N 100.7°W Coordinates: 50°24′N100°42′W / 50.4°N 100.7°W
Diameter	71 km
Depth	Unknown
Colongitude	101° at sunrise
Eponym	Sydney Chapman (mathematician)

Last updated August 09, 2019

Chapman is a lunar impact crater that lies just beyond the northwest rim of the Moon, on the far side as seen from the Earth. It lies to the northeast of the crater Rynin, and southward of the large walled plain Poczobutt.

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

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.

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 an old, eroded crater formation with features that have been softened and worn by impacts until now it just forms a bowl-shaped depression in the surface. The rim is circular in form along most of its perimeter, but has been broken through along the southern edge by Chapman W. There is an unnamed crater-like depression in the surface attached to the southwest rim, and here the edge is low and more narrow than the remaining inner wall.

Several small craters lie along the outer rim and inner wall, with an attached pair forming a cleft in the western rim. There is a slender cleft in the wall along the northwest inner wall that runs from the western rim to the north. The interior floor of the crater is relatively flat and featureless in comparison to the rugged terrain that surrounds the crater, although it is pock-marked by several small impacts in the southeast quadrant.

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 Chapman.

Chapman	Latitude	Longitude	Diameter
D	51.4° N	96.8° W	39 km
M	49.0° N	100.7° W	38 km
V	51.0° N	103.8° W	21 km

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Behaim is a lunar impact crater that is located near the eastern limb of the Moon, just to the south of the crater Ansgarius. To the south of Behaim is the crater Hecataeus, and to the east-southeast is Gibbs.

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Cleostratus is a lunar impact crater near the northwest limb of the Moon. It lies to the northeast of the crater Xenophanes, and west-southwest of the prominent Pythagoras. From the Earth this crater appears highly elongated due to foreshortening.

Chebyshev is a large lunar impact crater that lies in the southern hemisphere on the far side of the Moon. The somewhat smaller crater Langmuir is intruding into the east-southeastern rim of Chebyshev, forming a chain of large craters with Brouwer on Langmuir's eastern rim.

d'Alembert is a large lunar impact crater located in the northern hemisphere on the far side of the Moon, to the northeast of the somewhat smaller walled plain Campbell. Astride the southwest rim of d'Alembert is Slipher. To the north is the crater Yamamoto, and to the south-southwest lies Langevin. This walled plain has the same diameter as Clavius on the near side, making it one of the largest such formations on the Moon.

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Dyson is a lunar impact crater, 63 kilometers in diameter, that lies on the far side of the Moon, past the northwest limb. It is located in the northern part of the surface, to the northwest of the crater Coulomb, and east of van't Hoff.

Delmotte is a small lunar impact crater that lies just to the east of the much larger crater Cleomedes, and to the north of the Mare Crisium, in the northeastern part of the Moon. Delmotte appears foreshortened when viewed from the Earth, although not sufficiently to obscure the interior details.

Champollion is a lunar impact crater that lies on the far side of the Moon. It is located north-northeast of the larger crater Shayn, and south-southeast of Chandler.

Chandler is a lunar impact crater in the northern hemisphere, on the Moon's far side. It lies to the southeast of the large walled plain D'Alembert, and southeast of the slightly smaller Chernyshev crater.

Fraunhofer is a lunar impact crater that is located just to the south-southwest of the walled plain Furnerius, in the southeastern part of the Moon. This crater appears foreshortened when viewed from the Earth, and is actually nearly circular.

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Fowler is a large lunar impact crater that lies in the northern hemisphere on the Moon's far side. It lies to the south-southwest of the crater Esnault-Pelterie, and north of Gadomski. Overlying the eastern rim and intruding into the interior is Von Zeipel.

Ostwald is a lunar impact crater on the far side of the Moon. It lies just to the east of the crater Guyot, and near the northern border of Ibn Firnas. Recht lies along its eastern rim.

References

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 . 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 . 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.
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 revised 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.
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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.

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.

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.

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v t e Craters on the Moon: C-F
C/D	C. Herschel C. Mayer Cabannes Cabeus Cailleux Cai Lun Cajal Cajori Calippus Cameron Campanus Campbell Cannizzaro Cannon Cantor Capella Capuanus Cardanus Carlini Carlos Carmichael Carnot Carol Carpenter Carrel Carrillo Carrington Cartan Carver Casatus Cassegrain Cassini Catalán Catharina Cauchy Cavalerius Cavendish Caventou Cayley Celsius Censorinus Cepheus Chacornac Chadwick Chaffee Challis Chalonge Chamberlin Champollion Chandler Chang Heng Chang-Ngo Chant Chaplygin Chapman Chappe Chappell Charles Charlier Chaucer Chauvenet Chawla Chebyshev Chernyshev Chevallier Ching-Te Chladni Chrétien Cichus Clairaut Clark Clausius Clavius Cleomedes Cleostratus Clerke Coblentz Cockcroft Collins Colombo Compton Comrie Comstock Condon Condorcet Congreve Conon Cook Cooper Copernicus Cori Coriolis Couder Coulomb Courtney Cremona Crile Crocco Crommelin Crookes Crozier Crüger Ctesibius Curie Curtis Curtius Cusanus Cuvier Cyrano Cyrillus Cysatus D. Brown da Vinci Daedalus Dag Daguerre Dale d'Alembert Dalton Daly Damoiseau Daniell Danjon Dante Darney D'Arrest D'Arsonval Darwin Das Daubrée Davisson Davy Dawes Dawson De Forest de Gasparis de Gerlache De La Rue De Moraes De Morgan De Roy De Sitter De Vico De Vries Debes Debus Debye Dechen Delambre Delaunay Delia Delisle Dellinger Delmotte Delporte Deluc Dembowski Democritus Demonax Denning Desargues Descartes Deseilligny Deslandres Deutsch Dewar Diana Diderot Dionysius Diophantus Dirichlet Dobrovol'skiy Doerfel Dollond Donati Donna Donner Doppelmayer Doppler Douglass Dove Draper Drebbel Dreyer Drude Dryden Drygalski Dubyago Dufay Dugan Dunér Dunthorne Dyson Dziewulski
E/F	Eckert Eddington Edison Edith Egede Ehrlich Eichstadt Eijkman Eimmart Einstein Einthoven Elger Ellerman Ellison Elmer Elvey Emden Encke Endymion Engel'gardt Eötvös Epigenes Epimenides Eratosthenes Erlanger Erro Esclangon Esnault-Pelterie Espin Euclides Euctemon Eudoxus Euler Evans Evdokimov Evershed Ewen Fabbroni Fabricius Fabry Fahrenheit Fairouz Faraday Faustini Fauth Faye Fechner Fedorov Felix Fényi Feoktistov Fermat Fermi Fernelius Fersman Fesenkov Feuillée Fibiger Finsch Finsen Firmicus Firsov Fischer Fitzgerald Fizeau Flammarion Flamsteed Fleming Florensky Florey Focas Fontana Fontenelle Foster Foucault Fourier Fowler Fox Fra Mauro Fracastorius Franck Franklin Franz Fraunhofer Fredholm Freud Freundlich Fridman Froelich Frost Fryxell Furnerius

LRO image
Coordinates	50°24′N100°42′W / 50.4°N 100.7°W / 50.4; -100.7 Coordinates: 50°24′N100°42′W / 50.4°N 100.7°W / 50.4; -100.7
Diameter	71 km
Depth	Unknown
Colongitude	101° at sunrise
Eponym	Sydney Chapman (mathematician)