Hahn (crater)
Encyclopedia
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 mid-point of the interior is an elongated central ridge, with the longer extent oriented north–south. The floor is also marked by several tiny craterlets.
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 is located near the northeastern limb of the Moon
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...
. The crater appears oval when viewed from the Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...
due to foreshortening. It is located less than one crater diameter to the southeast of Berosus
Berosus (crater)
Berosus is a lunar crater that is located in the northeastpart of the Moon, less than one crater diameter northwest of Hahn. Further to the east-northeast is the large crater Gauss, and to the north-northwest lies Bernoulli...
, 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
Albedo
Albedo , or reflection coefficient, is the diffuse reflectivity or reflecting power of a surface. It is defined as the ratio of reflected radiation from the surface to incident radiation upon it...
in the northern half, making it darker in appearance than the southern section of the floor. At the mid-point 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
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 Hahn.| 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 |