Hermann (crater)
Encyclopedia
Hermann is a small lunar
crater
that is located in the western Oceanus Procellarum
, just over one crater diameter to the south of the Moon
's equator
. It is a solitary crater with only a few tiny craterlets and some low wrinkle ridges nearby.
The interior floor of this crater has been flooded with lava
, leaving a dark surface with the same albedo
as the surrounding lunar mare
. Only a low, nearly circular rim projects above the surface, which is not significantly eroded. The rim has a slight outward bulge on the western rim.
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 western Oceanus Procellarum
Oceanus Procellarum
Oceanus Procellarum is a vast lunar mare on the western edge of the near side of the Earth's Moon. Its name derives from the old superstition that its appearance during the second quarter heralded bad weather...
, just over one crater diameter to the south 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 equator
Equator
An equator is the intersection of a sphere's surface with the plane perpendicular to the sphere's axis of rotation and containing the sphere's center of mass....
. It is a solitary crater with only a few tiny craterlets and some low wrinkle ridges nearby.
The interior floor of this crater has been flooded with lava
Lava
Lava refers both to molten rock expelled by a volcano during an eruption and the resulting rock after solidification and cooling. This molten rock is formed in the interior of some planets, including Earth, and some of their satellites. When first erupted from a volcanic vent, lava is a liquid at...
, leaving a dark surface with the same 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...
as the surrounding lunar mare
Lunar mare
The lunar maria are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions. They were dubbed maria, Latin for "seas", by early astronomers who mistook them for actual seas. They are less reflective than the "highlands" as a result of their iron-rich compositions, and...
. Only a low, nearly circular rim projects above the surface, which is not significantly eroded. The rim has a slight outward bulge on the western rim.
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 Hermann.| Hermann | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 0.4° N | 58.2° W | 4 km |
| B | 0.3° S | 57.1° W | 5 km |
| C | 0.2° S | 60.6° W | 3 km |
| D | 2.3° S | 54.0° W | 3 km |
| E | 0.1° N | 52.0° W | 4 km |
| F | 1.3° N | 55.4° W | 3 km |
| H | 0.9° N | 61.8° W | 4 km |
| J | 2.6° N | 57.4° W | 4 km |
| K | 2.4° N | 58.3° W | 3 km |
| L | 2.4° N | 59.1° W | 3 km |
| R | 0.6° N | 55.6° W | 3 km |
| S | 1.0° N | 55.5° W | 4 km |