Henry (lunar crater)
Encyclopedia
Henry is a lunar
crater
that is located to the northwest of the larger crater Cavendish
, in the southeastern part of the Moon
's near side. Less than a half diameter to the northwest is similar-sized crater Henry Frères
, named for the brothers Paul and Prosper Henry.
The outer rim of Henry has undergone some impact erosion, particularly in the south and southeast where it is overlain by a pair of small craters. The former crater lies along the inner wall and part of the interior floor, with a rampart ridge to the north. The rim bulges outward slightly between these two depressions, and there are slight outward bulges to the north and northeast. The interior floor is relatively featureless, with an albedo
that matches the surrounding terrain
. A ray
from Byrgius A, a satellite of Byrgius
, crosses the northern half of the crater from west to east-northeast.
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 to the northwest of the larger crater Cavendish
Cavendish (crater)
Cavendish is a lunar crater that is located in the southwest part of the Moon, to the southwest of the larger crater Mersenius. It lies between the smaller craters Henry to the west-northwest and de Gasparis to the east-southeast....
, in the southeastern part 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...
's near side. Less than a half diameter to the northwest is similar-sized crater Henry Frères
Henry Frères (crater)
Henry Frères is a lunar crater that is located in the southwestern part of the Moon's near side. It lies just to the west-northwest of the crater Henry, a similar diameter feature. To the west-southwest of Henry Frères is the much larger crater Byrgius...
, named for the brothers Paul and Prosper Henry.
The outer rim of Henry has undergone some impact erosion, particularly in the south and southeast where it is overlain by a pair of small craters. The former crater lies along the inner wall and part of the interior floor, with a rampart ridge to the north. The rim bulges outward slightly between these two depressions, and there are slight outward bulges to the north and northeast. The interior floor is relatively featureless, with an 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...
that matches the surrounding terrain
Terrain
Terrain, or land relief, is the vertical and horizontal dimension of land surface. When relief is described underwater, the term bathymetry is used...
. A ray
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...
from Byrgius A, a satellite of Byrgius
Byrgius (crater)
Byrgius is a lunar crater located in the western part of the Moon, near the limb. As a result Byrgius appears strongly oval in form due to foreshortening. To the northwest is the nearly ruined crater Lamarck. The rim of Byrgius is worn and eroded, with Byrgius A overlying the eastern rim and...
, crosses the northern half of the crater from west to east-northeast.
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 Henry.| Henry | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 24.5° S | 57.1° W | 8 km |
| B | 24.3° S | 56.3° W | 5 km |
| D | 24.9° S | 59.1° W | 7 km |
| J | 22.8° S | 55.4° W | 5 km |
| K | 23.2° S | 55.5° W | 6 km |
| L | 25.5° S | 57.4° W | 6 km |
| M | 25.8° S | 57.6° W | 13 km |
| N | 26.1° S | 58.3° W | 9 km |
| P | 25.8° S | 59.0° W | 6 km |