Alfraganus (crater)

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Alfraganus crater 4084 h3.jpg
Coordinates5°24′S 19°00′E / 5.4°S 19.0°E / -5.4; 19.0Coordinates: 5°24′S 19°00′E / 5.4°S 19.0°E / -5.4; 19.0
Diameter20 km
Depth2.8 km
Colongitude343° at sunrise
Oblique view of Alfraganus from Apollo 16 Metric Camera
Oblique view of Alfraganus from Apollo 16 Panoramic Camera

Alfraganus is a small lunar impact crater that lies in the rugged highland region to the southwest of the Mare Tranquillitatis. It is named after Persian astronomer Alfraganus.[1] 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.

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 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


  1. ^ "Alfraganus". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.

External links[edit]