Opelt (crater)

Opelt (crater)

Coordinates	16.3°S 17.5°W / -16.3; -17.5
Diameter	48 km
Depth	Unknown
Colongitude	17° at sunrise
Eponym	Friedrich W. Opelt, Otto Moritz Opelt

Opelt is the lava-flooded remnant of a lunar crater on the Mare Nubium. It lies to the north of a similar formation named Gould, and to the northeast of the prominent Bullialdus.

Only a slightly raised outline remains of Opelt's rim, the interior having been inundated with lava. The rim has a wide break at the northern end and several smaller breaks to the south and southeast. The satellite craterlet Opelt E lies at the southern end of the surviving western rim. The interior floor is nearly level, with the exception of a slight rise to the southwest.

To the north of Opelt on the lunar mare is a sinuous system of rilles designated Rimae Opelt. These occupy a diameter of about 70 kilometers.

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 Opelt.

Opelt	Latitude	Longitude	Diameter
E	17.0° S	17.8° W	8 km
F	18.1° S	18.7° W	4 km
G	16.8° S	17.2° W	4 km
H	15.8° S	17.3° W	3 km
K	13.6° S	17.1° W	5 km

References

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• 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. 
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• 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. 
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• Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.