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Alden (crater)
Encyclopedia
Alden is a lunar
crater
that lies on the far side of the Moon
, between Hilbert
to the north-northwest and Milne
to the south-southeast. To the south-southwest lies Scaliger
.
Alden has a low rim that is overlain in the north and northeast by Alden C and the smaller Alden E. The rim is worn and eroded, especially along the southern wall. The floor is somewhat irregular and pitted. The small crater Alden V lies just inside the north rim, and is attached to Alden C to the east.
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 lies on the far side 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...
, between Hilbert
Hilbert (crater)
Hilbert is a lunar crater that is located on the far side of the Moon, just past the southeast limb. It lies just beyond the region of the surface that is occasionally brought into view due to libration, and so this feature cannot be observed directly from the Earth.The crater is attached to the...
to the north-northwest and Milne
Milne (crater)
Milne is a large lunar crater that is located in the southern hemisphere on the far side of the Moon, named after the British mathematician and astrophysicist Edward Arthur Milne...
to the south-southeast. To the south-southwest lies Scaliger
Scaliger (crater)
Scaliger is a prominent lunar impact crater that is located in the southern hemisphere on the far side of the Moon. It is attached to the northwest rim of the walled plain Milne, and the shared perimeter has reshaped the outer wall of Scaliger slightly, producing a straightened section along the...
.
Alden has a low rim that is overlain in the north and northeast by Alden C and the smaller Alden E. The rim is worn and eroded, especially along the southern wall. The floor is somewhat irregular and pitted. The small crater Alden V lies just inside the north rim, and is attached to Alden C to the east.
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 Alden.| Alden | Latitude | Longitude | Diameter |
|---|---|---|---|
| B | 20.5° S | 112.6° E | 17 km |
| C | 22.5° S | 111.4° E | 50 km |
| E | 23.2° S | 112.4° E | 28 km |
| V | 22.5° S | 110.1° E | 19 km |