Zwicky (crater)

Zwicky
	Crater Zwicky (big eroded crater in the bottom and center of the image) as seen by a mapping camera attached to the Service Module of Apollo 17
Coordinates	16°10′S 167°38′E / 16.17°S 167.64°E
Diameter	126.06 km (78.33 mi)
Depth	4.0 km (2.5 mi)
Colongitude	192° at sunrise
Eponym	Fritz Zwicky (astronomer)

Zwicky is a lunar impact crater that is located on the far side of the Moon. It lies to the west of the crater Aitken, and is attached to the western rim of Vertregt. Attached to the northern end of Zwicky is Heaviside. Zwicky is a considerably eroded formation with an irregular rim and interior. Portions of the southern rim still survive, but the remainder has been almost completely eradicated.

The satellite crater Zwicky N, located in the midst of the interior of Zwicky, has a relatively dark floor by comparison with the surrounding terrain. This smaller crater has a polygonal outline with relatively smooth inner walls. The interior floor is a lower albedo material that has a fractured surface.^[3] It is thought that this is caused by the cooling of molten material, or possibly tectonic movement. This is referred to informally as a "turtleback crater floor".

The crater was named in 1974 by the IAU^[4] after astronomer Fritz Zwicky (1898–1974), a professor at Caltech, Pasadena, and pioneer in the study of supernovae and of galaxy clusters. The minor planet 1803 Zwicky is also named in his honour.^[5]

Zwicky crater was known as Crater 306 prior to naming.^[6]

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 Zwicky. Zwicky N crater had the proposed name of Ibn Hayyan,^[1]^[2] but this was not approved by the IAU.

Zwicky	Coordinates	Diameter, km
N	15°55′S 167°34′E / 15.92°S 167.57°E / -15.92; 167.57 (Zwicky N)	29.6
R	18°08′S 163°35′E / 18.13°S 163.59°E / -18.13; 163.59 (Zwicky R)	29.0
S	16°05′S 162°47′E / 16.09°S 162.79°E / -16.09; 162.79 (Zwicky S)	45.6

Zwicky N from Apollo 17 panoramic camera
Another view of Zwicky N from Apollo 17

References

^ ^a ^b LTO-103B2 Zwicky, Lunar Topographic Orthophotomap (LTO) Series, Publisher: Defense Mapping Agency, Scale: 1:250,000.
^ ^a ^b LTO-85C3 Ibn Hayyan, Lunar Topographic Orthophotomap (LTO) Series, Publisher: Defense Mapping Agency, Scale: 1:250,000.
^ The geologic history of the Moon, 1987, Wilhelms, Don E.; with sections by McCauley, John F.; Trask, Newell J. USGS Professional Paper: 1348. (online)
^ Zwicky, Gazetteer of Planetary Nomenclature, International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN)
^ Schmadel, Lutz D. (2007). "(1803) Zwicky". Dictionary of Minor Planet Names – (1803) Zwicky. Springer Berlin Heidelberg. p. 144. doi:10.1007/978-3-540-29925-7_1804. ISBN 978-3-540-00238-3.
^ Lunar Farside Chart (LFC-1A)

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 2017-06-03.
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.
Moore, Patrick (2001). On the Moon. Sterling Publishing Co. ISBN 978-0-304-35469-6.
Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 978-0-521-62248-6.

External links

LTO-85C3, Ibn Hayyan, Lunar Topographic Orthophotomap (LTO) Series, Defense Mapping Agency, Scale: 1:250,000

[103B2-1] LTO-103B2 Zwicky, Lunar Topographic Orthophotomap (LTO) Series, Publisher: Defense Mapping Agency, Scale: 1:250,000.

[85C3-2] LTO-85C3 Ibn Hayyan, Lunar Topographic Orthophotomap (LTO) Series, Publisher: Defense Mapping Agency, Scale: 1:250,000.

[3] The geologic history of the Moon, 1987, Wilhelms, Don E.; with sections by McCauley, John F.; Trask, Newell J. USGS Professional Paper: 1348. (online)

[4] Zwicky, Gazetteer of Planetary Nomenclature, International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN)

[springer-5] Schmadel, Lutz D. (2007). "(1803) Zwicky". Dictionary of Minor Planet Names – (1803) Zwicky. Springer Berlin Heidelberg. p. 144. doi:10.1007/978-3-540-29925-7_1804. ISBN 978-3-540-00238-3.

[6] Lunar Farside Chart (LFC-1A)

[1]

[2]

[3]

[4]

[5]

[6]

Zwicky (crater)

Satellite craters

References

External links

Information related to Zwicky (crater)

Portal di Ensiklopedia Dunia