Petermann (crater)
Encyclopedia
Petermann is a lunar
crater
that is located near the northern limb of the Moon
, on the eastern hemisphere
. It is located about 10 kilometres to the north of the crater Cusanus
. Due to its location, this crater appears significantly foreshortened when viewed from the Earth
, and its visibility can be affected by libration
.
Attached to the western rim of this crater is the large, heavily eroded crater Petermann R, which is much larger than Petermann although less prominent in appearance. The outer rim of Petermann is eroded, but retains some structure including traces of terraces. The inner wall varies in width around the perimeter, being wider to the south and southeast near Cusanus. The interior floor has been resurfaced, leaving a level plain that is marked only by a number of tiny craterlets and only a few low ridges near the sides.
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...
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 northern 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...
, on the eastern hemisphere
Sphere
A sphere is a perfectly round geometrical object in three-dimensional space, such as the shape of a round ball. Like a circle in two dimensions, a perfect sphere is completely symmetrical around its center, with all points on the surface lying the same distance r from the center point...
. It is located about 10 kilometres to the north of the crater 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...
. Due to its location, this crater appears significantly foreshortened 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...
, and its visibility can 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:...
.
Attached to the western rim of this crater is the large, heavily eroded crater Petermann R, which is much larger than Petermann although less prominent in appearance. The outer rim of Petermann is eroded, but retains some structure including traces of terraces. The inner wall varies in width around the perimeter, being wider to the south and southeast near Cusanus. The interior floor has been resurfaced, leaving a level plain that is marked only by a number of tiny craterlets and only a few low ridges near the sides.
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 Petermann.| Petermann | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 75.0° N | 87.1° E | 17 km |
| B | 72.8° N | 63.8° E | 11 km |
| C | 71.6° N | 57.7° E | 13 km |
| D | 77.1° N | 65.8° E | 31 km |
| E | 72.5° N | 53.7° E | 13 km |
| R | 75.0° N | 56.7° E | 115 km |
| S | 75.2° N | 61.9° E | 8 km |
| X | 75.1° N | 73.3° E | 9 km |
| Y | 76.0° N | 87.4° E | 13 km |