Roche (crater)

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Crater characteristics
Coordinates	42.3° S, 136.5° E
Diameter	160 km
Depth	Unknown
Colongitude	226° at sunrise
Eponym	Édouard A. Roche

Roche is a large crater on the far side of the Moon from the Earth. The prominent Pauli crater lies across the southern rim of Roche, and the outer rampart of Pauli covers a portion of Roche's interior floor. To the north-northwest of Roche is the Eötvös crater, and just to the west-northwest lies Rosseland crater.

The western rim of Roche has been somewhat distorted and straightened. The rim as a whole is worn and eroded, with multiple tiny craterlets marking the surface. The satellite crater 'Roche B' lies across the northeastern inner wall.

The interior floor of Roche is relatively level, but is also marked by several small and tiny craterlets. A grouping of these craters lies near the mid-point. Just to the northwest of this grouping is a bright patch of high albedo material. Sections of the floor along the north-northwestern side have a lower albedo than elsewhere, usually an indication of basaltic-lava flows similar to what created the lunar mares. The extend of this patch may actually be larger, but covered with higher albedo ejecta.

[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 Roche crater.

Roche	Latitude	Longitude	Diameter
B	40.1° S	137.2° E	24 km
C	39.0° S	139.2° E	18 km
V	38.5° S	129.3° E	30 km
W	39.0° S	130.5° E	20 km

[edit] References

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