Hayn (crater)
Encyclopedia
Hayn is a lunar
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 next to the northeast 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...

. This location restricts the amount of detail that can be 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...

, as the western inner side is permanently hidden from sight. Observation of this crater can also be affected by libration
Libration
In astronomy, libration is an oscillating motion of orbiting bodies relative to each other, notably including the motion of the Moon relative to Earth, or of Trojan asteroids relative to planets.-Lunar libration:...

, which can completely hide this crater from sight.

This crater lies across the northwestern rim of the walled plain Bel'kovich
Bel'kovich (crater)
Bel'kovich is a large lunar crater of the form termed a walled plain. The formation has been heavily eroded by a history of subsequent impacts, leaving it reshaped, worn, and the features softened and rounded. Bel'kovich is located along the northeastern limb of the Moon, and so its visibility is...

, to the north of the Mare Humboldtianum
Mare Humboldtianum
Mare Humboldtianum is a lunar mare located within the Humboldtianum basin, just to the east of Mare Frigoris. It is located along the northeastern limb of the Moon, and continues on to the far side...

. It is otherwise relatively isolated from other named craters, with the nearest being Cusanus
Cusanus (crater)
Cusanus is a lunar impact crater that is located near the northeastern limb of the Moon. In this location the crater appears very foreshortened when observed from the Earth, and its visibility is affected by libration...

 to the northwest.

This is a young crater with a rim and interior that have not yet been significantly eroded. It has a circular but somewhat uneven rim and an inner wall containing a number of terraces. The southern rim is slightly more pronounced in height where it joins the heavily worn rim of Bel'kovich. There is also an outer rampart beyond the rim that is more extensive to the southwest. Of the rim of Bel'kovich to the east of Hayn there is little sign, and the ground to the east is not dissimilar to the other terrain surrounding the crater.

The interior floor is relatively flat compared to the terrain surrounding the crater. A system of several ridges lie near the interior mid-point, with a wide valley running north-south that divides the range in half. There are also smaller lateral valleys, and all told there are some half dozen peaks. The remainder of the floor also contains several smaller hills, particularly just to the west of the central peaks.

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 Hayn.
Hayn Latitude Longitude Diameter
A 62.9° N 70.5° E 54 km
B 65.2° N 64.1° E 25 km
C 65.0° N 88.0° E 13 km
D 65.5° N 62.0° E 20 km
E 67.1° N 66.4° E 42 km
F 68.0° N 84.0° E 59 km
G 67.2° N 85.6° E 21 km
H 63.4° N 68.5° E 14 km
J 66.7° N 64.2° E 39 km
L 64.4° N 68.0° E 27 km
M 62.9° N 66.5° E 7 km
S 68.0° N 66.1° E 10 km
T 68.4° N 74.4° E 7 km
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