Elvey (crater)
Encyclopedia
Elvey is a lunar
crater
that is located on the far side of the Moon
. It is located near the northern edge of the blanket of ejecta that surrounds the Mare Orientale
impact basin. To the north of Elvey is the smaller crater Nobel
.
This is a damaged crater with a rim that is only partly intact along the eastern side. The remainder of the rim is irregular and less distinct. This condition may have been created by the ejecta from the Mare Orientale impact to the south. A pair of small craters lies along the northwestern rim.
Less than two crater diameters to the south of Elvey is the impact site of a small crater. This formation lies at the focus of a ray system
that extends over 200 km in all directions. The central portion of this system forms a bright skirt of higher albedo
material, while the rays become progressively more wispy with distance. There is a larger but less distinct ray system farther to the northwest of Elvey, and these two systems criss-cross each other along a section of terrain containing Elvey.
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 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...
. It is located near the northern edge of the blanket of ejecta that surrounds the Mare Orientale
Mare Orientale
Mare Orientale is one of the most striking large scale lunar features, resembling a target ring bull's-eye. Located on the extreme western edge of the lunar nearside, this impact basin is difficult to see from an Earthbound perspective.Material from this basin was not sampled by the Apollo program...
impact basin. To the north of Elvey is the smaller crater Nobel
Nobel (crater)
Nobel is a crater that lies on the far side of the Moon. It is located in the northern edge of the vast skirt of ejecta surrounding the Mare Orientale impact basin. Less than three crater diameters to the south of Nobel is the larger crater Elvey, and to the west-southwest is the smaller Pease....
.
This is a damaged crater with a rim that is only partly intact along the eastern side. The remainder of the rim is irregular and less distinct. This condition may have been created by the ejecta from the Mare Orientale impact to the south. A pair of small craters lies along the northwestern rim.
Less than two crater diameters to the south of Elvey is the impact site of a small crater. This formation lies at the focus of a ray system
Ray system
A ray system comprises radial streaks of fine ejecta thrown out during the formation of an impact crater, looking a bit like many thin spokes coming from the hub of a wheel. The rays can extend for lengths up to several times the diameter of their originating crater, and are often accompanied by...
that extends over 200 km in all directions. The central portion of this system forms a bright skirt of higher 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...
material, while the rays become progressively more wispy with distance. There is a larger but less distinct ray system farther to the northwest of Elvey, and these two systems criss-cross each other along a section of terrain containing Elvey.
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 Elvey.| Elvey | Latitude | Longitude | Diameter |
|---|---|---|---|
| G | 7.8° N | 97.9° W | 14 km |
| K | 6.0° N | 98.8° W | 22 km |