Vertregt (crater)

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Crater characteristics
Coordinates	19.8° S, 171.1° E
Diameter	187 km
Depth	Unknown
Colongitude	189° at sunrise
Eponym	Marinus Vertregt

Vertregt is the ancient remnant of a large lunar impact crater. It is located on the far side of the Moon, to the north of the unusual Van de Graaff walled-plain. The prominent Aitken crater lies across the northeast rim of Vertregt, and Zwicky crater is attached to the northwest rim.

The Vertregt formation has been heavily eroded and reshaped by subsequent events, leaving only a few segments of the outer rim still visible. The northwestern section of the rim is the most intact portion, although even this arcing ridge is marked by small craterlets.

The interior consists rugged ridges and smaller impacts, most prominently the crater pair of 'Vertregt L' and 'Vertregt K' in the southeast. There is a wide rift leading from the southern end of the crater floor toward the Van de Graaff formation.

[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 Vertregt crater.

Vertregt	Latitude	Longitude	Diameter
J	21.5° S	174.3° E	17 km
K	20.1° S	172.0° E	27 km
L	21.1° S	171.5° E	38 km
P	23.6° S	170.0° E	24 km
R	21.8° S	167.1° E	25 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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• Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 1852331933.