Henry Frères (crater)
Encyclopedia
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
. Rays
from the satellite crater Byrgius A lie across the floor of this formation, forming a wispy trace from west to east.
The outer rim of Henry Frères is nearly circular, with a slight outward bulge along the southwest. When viewed from the Earth
, however, this crater has more of an oval
shape due to foreshortening. There is some irregularity along the northeast, but the rim is otherwise not significantly eroded or overlain by craters of note. The western part of the interior floor has some uneven areas, and a small crater lies in the northern part of the floor.
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 in the southwestern 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. It lies just to the west-northwest of the crater Henry
Henry (lunar crater)
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...
, a similar diameter feature. To the west-southwest of Henry Frères is the much larger crater 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...
. Rays
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 the satellite crater Byrgius A lie across the floor of this formation, forming a wispy trace from west to east.
The outer rim of Henry Frères is nearly circular, with a slight outward bulge along the southwest. 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...
, however, this crater has more of an oval
Oval
An oval is any curve resembling an egg or an ellipse, such as a Cassini oval. The term does not have a precise mathematical definition except in one area oval , but it may also refer to:* A sporting arena of oval shape** a cricket field...
shape due to foreshortening. There is some irregularity along the northeast, but the rim is otherwise not significantly eroded or overlain by craters of note. The western part of the interior floor has some uneven areas, and a small crater lies in the northern part of the floor.
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 Frères.| Henry Frères |
Latitude | Longitude | Diameter |
|---|---|---|---|
| C | 24.6° S | 59.7° W | 37 km |
| E | 24.6° S | 60.0° W | 4 km |
| G | 22.8° S | 58.0° W | 4 km |
| H | 22.3° S | 56.6° W | 6 km |
| R | 21.5° S | 57.8° W | 7 km |
| S | 20.5° S | 56.4° W | 6 km |