Roche (crater)
 | |
| Coordinates | 42°18′S 136°30′E / 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 crater Pauli 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 crater Eötvös, and just to the west-northwest lies Rosseland.
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 midpoint. 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 fills the lunar maria. The extent of this patch may actually be larger, but covered with higher-albedo ejecta.
Satellite craters
[edit]By convention, these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Roche.
| 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 |
References
[edit]- Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
- Blue, Jennifer (July 25, 2007). "Gazetteer of Planetary Nomenclature". USGS. Retrieved 2007-08-05.
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