Geminus (crater)

Geminus (crater)

lunar crater data
latitude=34.5
N_or_S=N
longitude=56.7
E_or_W=E
diameter=86 km
depth=5.4 km
colong=304
eponym=Geminus

Geminus is a lunar impact crater that is located near the northeast limb of the visible Moon. In this position the crater appears oval in shape due to foreshortening, but it is actually more nearly circular in form. Notable nearby craters include Messala to the northeast, Bernoulli due east, and Burckhardt and Cleomedes to the south.

The circular rim of Geminus contain a number of outward notches, particularly to the north and east. The crater "ejecta" is still visible in the rough surroundings beyond the rim, but any rays deposited during the impact have long since been worn away by space weathering. The inner wall is wide and extensively d, although these features are now somewhat muted due to impact erosion. There are no notable impacts on the interior floor, but there is a long, slender central ridge located at the mid-point and a pair of readily observed clefts.

atellite craters

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 Geminus crater.

References


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  • Geminus — ( el. Γεμῖνος) of Rhodes, was a Greek astronomer and mathematician, who flourished in the 1st century BC. An astronomy work of his, the Introduction to the Phenomena , still survives; it was intended as an introductory astronomy book for students …   Wikipedia

  • Messala (crater) — Coordinates 39°12′N 59°54′E / 39.2°N 59.9°E / …   Wikipedia

  • Burckhardt (crater) — lunar crater data latitude=31.1 N or S=N longitude=56.5 E or W=E diameter=57 km depth=4.8 km colong=304 eponym=Johann K. BurckhardtBurckhardt is a lunar impact crater that is located in the northeast part of the Moon. It lies between the craters… …   Wikipedia

  • Bernoulli (crater) — lunar crater data latitude=35.0 N or S=N longitude=60.7 E or W=E diameter=47 km depth=4.0 km colong=300 eponym=Jacques Bernoulli Jean BernoulliBernoulli is a lunar impact crater that is located in the northeast part of the Moon. It lies to the… …   Wikipedia

  • Berzelius (crater) — lunar crater data latitude=36.6 N or S=N longitude=50.9 E or W=E diameter=51 km depth=1.7 km colong=310 eponym=Jöns J. BerzeliusBerzelius is a lunar crater located in the northeast part of the Moon s near side. It lies to the southeast of the… …   Wikipedia

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  • Cráteres lunares — Anexo:Cráteres lunares Saltar a navegación, búsqueda Esta es una lista de 1517 cráteres de impacto lunares que han sido nombrados. La convención de la UAI para nombrar estos accidentes selenográficos es la de usar los nombres aquellos fallecidos… …   Wikipedia Español

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  • Cleomedes — This article concerns the Greek astronomer. For the article on the lunar crater named for him, see Cleomedes (crater). Cleomedes (Κλεoμήδης) was a Greek astronomer who is known chiefly for his book On the Circular Motions of the Celestial Bodies …   Wikipedia

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