Alfraganus (crater)
Encyclopedia
Alfraganus is a small lunar
impact crater
that lies in the rugged highland region to the southwest of the Mare Tranquillitatis
. Northwest of Alfraganus is the crater Delambre
, and to the south is the irregular Zöllner
. The rim of Alfraganus is circular and retains a sharp edge that has not received a significant amount of wear due to subsequent impacts. The interior floor is roughly half the diameter of the crater rim.
Moon
The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...
impact crater
Impact crater
In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...
that lies in the rugged highland region to the southwest of the Mare Tranquillitatis
Mare Tranquillitatis
Mare Tranquillitatis is a lunar mare that sits within the Tranquillitatis basin on the Moon. The mare material within the basin consists of basalt formed in the intermediate to young age group of the Upper Imbrian epoch. The surrounding mountains are thought to be of the Lower Imbrian epoch, but...
. Northwest of Alfraganus is the crater Delambre
Delambre (crater)
Delambre is a lunar impact crater that lies to the southwest of Mare Tranquillitatis, in the central highland region. To the west is the crater pair of Theon Junior and Theon Senior, the latter being more distant and located to the northwest. It is 52 kilometers in diameter and 3.5 kilometers in...
, and to the south is the irregular Zöllner
Zöllner (crater)
Zöllner is a lunar impact crater located to the west of Sinus Asperitatis. To the north is the smaller crater Alfraganus and to the northwest lies the oval-shaped Taylor. Southeast of Zöllner is the smaller crater Kant....
. The rim of Alfraganus is circular and retains a sharp edge that has not received a significant amount of wear due to subsequent impacts. The interior floor is roughly half the diameter of the crater rim.
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 Alfraganus.| Alfraganus | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 3.0° S | 20.3° E | 13 km |
| C | 6.1° S | 18.1° E | 11 km |
| D | 4.0° S | 20.1° E | 8 km |
| E | 4.6° S | 19.0° E | 4 km |
| F | 3.5° S | 20.8° E | 9 km |
| G | 2.6° S | 21.2° E | 6 km |
| H | 4.4° S | 19.1° E | 13 km |
| K | 5.3° S | 19.5° E | 4 km |
| M | 5.6° S | 19.6° E | 3 km |