Hahn (crater)

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Hahn crater 4165 h2.jpg
Oblique Lunar Orbiter 4 image
Coordinates31°18′N 73°36′E / 31.3°N 73.6°E / 31.3; 73.6Coordinates: 31°18′N 73°36′E / 31.3°N 73.6°E / 31.3; 73.6
Diameter84 km
Depth3.0 km
Colongitude288° at sunrise
EponymFriedrich von Hahn
Otto Hahn
Oblique view from Apollo 16
Oblique view of Hahn in foreground, and Berosus behind it, from Apollo 14

Hahn is a lunar impact crater that is located near the northeastern limb of the Moon. The crater appears oval when viewed from the Earth due to foreshortening. It is located less than one crater diameter to the southeast of Berosus, a slightly smaller formation.

The inner wall of Hahn contains a system of terraces, particularly in the southern half. A smaller crater lies across the northwest rim, forming a break that reaches the interior floor. The interior floor has a region of lower albedo in the northern half, making it darker in appearance than the southern section of the floor. At the midpoint of the interior is an elongated central ridge, with the longer extent oriented north–south. The floor is also marked by several tiny craterlets.

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 Hahn.

Berosus + Hahn - LROC - WAC.JPG
Hahn Latitude Longitude Diameter
A 29.7° N 69.7° E 17 km
B 31.4° N 77.0° E 15 km
D 27.5° N 68.6° E 15 km
E 27.7° N 70.0° E 15 km
F 32.2° N 73.0° E 23 km


  • Wood, Chuck (December 27, 2006). "A Dark Oblique Ray". Lunar Photo of the Day. Archived from the original on September 27, 2007. Retrieved 2007-01-02.