Astronomy:Alden (crater)

Short description: Crater on the Moon

Alden

Lunar crater Alden from Apollo 15. NASA image.
Diameter	104 km
Depth	Unknown
Colongitude	250° at sunrise

Lunar Orbiter 3 image, facing southeast

Alden is a lunar impact crater that lies on the far side of the Moon, between Hilbert to the north-northwest and Milne to the south-southeast. To the south-southwest lies Scaliger.

Alden has a low rim that is overlain in the north and northeast by Alden C and the smaller Alden E. The rim is worn and eroded, especially along the southern wall. The floor is somewhat irregular and pitted. The small crater Alden V lies just inside the north rim, and is attached to Alden C to the east.

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 Alden.

Alden	Latitude	Longitude	Diameter
B	20.5° S	112.6° E	17 km
C	22.5° S	111.4° E	50 km
E	23.2° S	112.4° E	28 km
V	22.5° S	110.1° E	19 km

References

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• Blue, Jennifer (July 25, 2007). "Gazetteer of Planetary Nomenclature". USGS. http://planetarynames.wr.usgs.gov/. 
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• Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.