Euclides (crater)

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Crater characteristics
Coordinates	7.4° S, 29.5° W
Diameter	12 km
Depth	1.3 km
Colongitude	29° at sunrise
Eponym	Euclid

Euclides is a small lunar impact crater located near the eastern edge of Oceanus Procellarum, about 30 kilometers to the west of the Montes Riphaeus mountains. The mare in the vicinity is devoid of significant craters, but to the west is an area of low rises. The crater is named after the Greek mathematician Euclid.

The Euclides is a bowl-shaped formation with a circular rim. It is surrounded by streaks of ejacta that have a higher albedo than the nearby maria. This nebulous skirt of light-hued material makes this feature very prominent under a high sun, and it is one of the brightest sites on the Moon.

[edit] Euclides D

'Euclides D' is a small lunar impact crater in the Mare Cognitum. It has a diameter of 6 kilometers and a depth of 1.3 kilometers. It lies to the southeast of Euclides crater, beyond the Montes Riphaeus mountains.

In 1976, 'Euclides D' was renamed by the IAU to Eppinger to honor Hans Eppinger, a professor of pathological anatomy at Graz. However in 2002, after Eppinger's association with Nazi prison camps had been brought to the attention of the Working Group for Planetary System Nomenclature, the name was changed.

[edit] Satellite 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 Euclides crater.

Euclides	Latitude	Longitude	Diameter
C	13.2° S	30.0° W	10 km
D	9.4° S	25.7° W	6 km
E	6.3° S	25.1° W	4 km
F	6.3° S	33.7° W	5 km
J	6.4° S	28.5° W	4 km
K	4.2° S	24.7° W	6 km
M	10.4° S	28.2° W	6 km
P	4.5° S	27.6° W	66 km

The following craters have been renamed by the IAU.

• Euclides B — See Norman crater.

[edit] References

• Enersen, Ole Daniel (2007). Hans Eppinger. Who Named It?. Retrieved on 2007-08-07.
• 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 on 2007-08-05.
• Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 0-521-81528-2. 
• Cocks, Elijah E.; Cocks, Josiah C. (1995). Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature. Tudor Publishers. ISBN 0-936389-27-3. 
• McDowell, Jonathan (July 15, 2007). Lunar Nomenclature. Jonathan's Space Report. Retrieved on 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: 136. 
• Moore, Patrick (2001). On the Moon. Sterling Publishing Co.. ISBN 0-304-35469-4. 
• Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 0521335000. 
• Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 0-913135-17-8. 
• Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes, 6th revision, Dover. ISBN 0-486-20917-2. 
• Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 0-521-62248-4. 
• Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 1852331933.