| Crater characteristics | |
| Coordinates | 50. Selenographic coordinates are used to refer to locations on the surface of Earth 's Moon. 8° N, 163. 9° E |
|---|---|
| Diameter | 248 km |
| Depth | Unknown |
| Colongitude | 201° at sunrise |
| Eponym | Jean d'Alembert |
D'Alembert is a large lunar impact crater that is located in the northern hemisphere on the far side of the Moon. Geometry, a diameter of a Circle is any straight Line segment that passes through the center of the circle and whose Endpoints are on the The depth of any crater in a solid Planet or moon - whether it is an Impact crater, a Volcanic crater, or a Subsidence crater - may Selenographic coordinates are used to refer to locations on the surface of Earth 's Moon. 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 larger body Northern Hemisphere is the half of a Planet that is North of the Equator —the word hemisphere literally means 'half ball' Far Side of the Moon, in original French, La face cachée de la lune, is a 2003 film by Robert Lepage. It is located to the northeast of the Campbell walled plain, a somewhat smaller formation. Campbell is a large lunar crater that is located in the Northern hemisphere on the far side of the Moon. Laying astride the southwest rim of D'Alembert is the Slipher crater. Slipher is a lunar Impact crater that is located in the northern latitudes on the far side of the Moon. To the north is Yamamoto crater, and to the south-southwest lies Langevin crater. Yamamoto is a damaged lunar crater that is located to the north of the large D'Alembert walled-plain. Langevin is a lunar crater on the far side of the Moon. It is located to the east of the Campbell walled plain, and to the west of This walled plain has the same diameter as Clavius crater on the near side, making it one of the largest such formations on the Moon. Clavius is one of the largest crater formations on the Moon, and it is the third largest crater on the visible near side
As with many lunar walled plains of comparable dimensions, the outer rim of this formation has been worn and battered by subsequent impacts. Besides Slipher crater, the most notable of these craters is 'D'Alembert Z' intruding into the northern rim. There is also a small crater on the northwest inner wall that has a wide cleft in its eastern side, and a smaller crater along the southeastern inner wall. As eroded as the rim may be, its form can still be readily discerned as a roughly circular ridge line in the lunar terrain.
The interior floor of D'Alembert is a relatively level surface, at least in comparison with the rough terrain that surrounds the crater rim. It is marked with a number of small crater impacts, the largest being 'D'Alembert G' and 'D'Alembert E' toward the eastern rim. In the southwest, the floor is more irregular due to the outer rampart and layers of ejecta from Slipher crater. A pair of shallow clefts in the floor surface radiate away from this crater, beginning near the mid-point of D'Alembert and reaching half-way toward the inner wall.
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 d'Alembert crater.
| d'Alembert | Latitude | Longitude | Diameter |
|---|---|---|---|
| E | 52. 8° N | 168. 2° E | 22 km |
| G | 50. 9° N | 167. 5° E | 18 km |
| J | 47. 5° N | 170. 4° E | 20 km |
| Z | 55. 4° N | 165. 6° E | 44 km |
References
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