Billy (crater)
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| Crater characteristics | |
|---|---|
| Coordinates | 13.8° S, 50.1° W |
| Diameter | 45 km |
| Depth | 1.2 km |
| Colongitude | 50° at sunrise |
| Eponym | Jacques de Billy |
Billy is a lunar crater that is located at the southern fringes of the Oceanus Procellarum, in the western portion of the Moon. It lies to the southeast of the similar-sized Hansteen crater, and west-southwest of the flooded Letronne crater.
The interior floor of Billy crater has been flooded by basaltic lava, leaving a dark surface due to the low albedo. The portion of the rim remaining above the surface is narrow and low, with a thin inner wall. Only a few tiny craterlets mark the interior.
To the north of the crater is a triangular mountainous formation named Mons Hansteen, from the nearby crater. Southeast of Billy crater is a rille, designated Rima Billy, that runs 70 kilometers to the south.
[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 Billy crater.
| Billy | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 14.3° S | 46.3° W | 7 km |
| B | 12.2° S | 47.6° W | 25 km |
| C | 16.1° S | 49.0° W | 6 km |
| D | 14.9° S | 48.3° W | 11 km |
| E | 15.0° S | 49.6° W | 2 km |
| H | 15.6° S | 49.6° W | 3 km |
| K | 12.9° S | 48.7° W | 4 km |
[edit] References
- See the reference table for the general listing of literature and web sites that were used in the compilation of this page.
[edit] External links
- Dark lava floor of crater Billy seen by SMART-1. ESA. Retrieved on March 31, 2006.
