Oenopides (crater)

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Crater characteristics
Coordinates	57.0° N, 64.1° W
Diameter	67 km
Depth	Unknown
Colongitude	66° at sunrise
Eponym	Oenopides of Chios

Oenopides is a lunar crater that is located near the northwest limb of the Moon, and so appears foreshortened when viewed from the Earth. This formation lies due south of the prominent Pythagoras crater, and is attached to the southwest rim of 'Babbage E'. The southwest rim of Oenopides is part of the northern edge of Oceanus Procellarum. To the south is the Markov crater.

This formation is an old crater that has been heavily eroded by subsequent impacts, leaving a low outer rim that is generally hilly and contains a few clefts. There is a gap in the southeast rim, and the level interior is attached to the lunar mare to the south. There are several small craters lying near the eastern rim, and the remainder of the floor is marked by tiny craterlets.

To the southwest is the remnant of 'Oenopides R', of which only parts of the rim are still protruding above the surface and the southern rim is completely missing.

[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 Oenopides crater.

Oenopides	Latitude	Longitude	Diameter
B	58.5° N	68.6° W	34 km
K	55.8° N	61.2° W	6 km
L	55.5° N	61.9° W	10 km
M	55.5° N	61.1° W	6 km
R	55.6° N	67.9° W	56 km
S	58.1° N	69.9° W	7 km
T	57.2° N	68.9° W	8 km
X	57.5° N	62.4° W	5 km
Y	57.0° N	63.3° W	6 km
Z	58.9° N	67.0° W	7 km

[edit] References

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• Blue, Jennifer (July 25, 2007). Gazetteer of Planetary Nomenclature. USGS. Retrieved on 2007-08-05.
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• Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 0521335000. 
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• 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.