Arzachel (crater)
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| Crater characteristics | |
|---|---|
| Coordinates | 18.2° S, 1.9° W |
| Diameter | 96 km |
| Depth | 3.6 km |
| Colongitude | 3° at sunrise |
| Eponym | Al-Zarqali |
Arzachel is a relatively young lunar impact crater located in the highlands in the south-central part of the visible Moon, close to the zero meridian (the visible center of the moon). It lies to the south of Alphonsus crater, and together with Ptolemaeus crater further north the three form a prominent line of craters to the east of Mare Nubium. The smaller Alpetragius crater lies to the northwest, and Thebit crater is to the southwest along the edge of the mare.
It is remarkably clear in its structure and a favorite telescope viewing subject for advanced amateur astronomers. The rim of Arzachel shows little sign of wear and has a detailed terrace structure on the interior, especially on the slightly higher eastern rim. There is a rough outer rampart that joins a ridge running from the north rim to southern rim of Alphonsus crater.
The rugged central peak of Arzachel is prominent, rising 1.5 kilometers above the floor, and is somewhat offset to the west with a bowed curve from south to north-northeast. The floor is relatively flat, except for some irregularities in the southwestern quadrant of the crater. There is a rille system named the Rimae Arzachel that runs from the northern wall to the southeast rim. A small crater lies prominently in the floor to the east of the central peak, with a pair of smaller craterlets located nearby.
[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 Arzachel crater.
| Arzachel | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 18.0° S | 1.5° W | 10 km |
| B | 17.0° S | 2.9° W | 8 km |
| C | 17.4° S | 3.7° W | 6 km |
| D | 20.2° S | 2.1° W | 8 km |
| H | 18.7° S | 2.0° W | 5 km |
| K | 18.3° S | 1.6° W | 4 km |
| L | 20.0° S | 0.1° E | 8 km |
| M | 20.6° S | 0.9° W | 3 km |
| N | 20.4° S | 2.2° W | 3 km |
| T | 17.7° S | 1.3° W | 3 km |
| Y | 18.2° S | 4.3° 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.
- Wood, Chuck (2006-07-17). Another FFC (English). Lunar Photo of the Day. Retrieved on 2006-07-17.
