Grotrian (crater)
Encyclopedia
Grotrian is a lunar
impact crater
that is located on the southern hemisphere
on the far side of the Moon
. It lies to the north of the huge walled plain Schrödinger
, within the radius of that formation's outer blanket of ejecta. The long Vallis Planck
formation begins just to the north of Grotrian, and continues to the north-northwest towards Pikel'ner
.
The outer wall of this crater forms a very nearly circular shape, with only a small crater across the southern rim to break up the symmetry. The interior surfaces form relatively smooth slopes that continue down to the material deposited across the bottom. Apart from the aforementioned impact and a tiny craterlet on the northern edge of the rim, this formation has not been significantly eroded by subsequent impacts.
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...
impact 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 southern hemisphere
Sphere
A sphere is a perfectly round geometrical object in three-dimensional space, such as the shape of a round ball. Like a circle in two dimensions, a perfect sphere is completely symmetrical around its center, with all points on the surface lying the same distance r from the center point...
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 lies to the north of the huge walled plain Schrödinger
Schrödinger (crater)
Schrödinger is a huge lunar impact crater of the form traditionally called a walled plain and is named after Erwin Schrödinger. It is located near the south lunar pole on the far side of the Moon, and can only be viewed from orbit. The smaller crater Ganswindt is attached to the southwestern rim of...
, within the radius of that formation's outer blanket of ejecta. The long Vallis Planck
Vallis Planck
Vallis Planck is a long, linear valley located on the far side of the Moon. It is oriented radially to the huge Schrödinger basin, and was most likely formed by that impact...
formation begins just to the north of Grotrian, and continues to the north-northwest towards Pikel'ner
Pikel'ner (crater)
Pikel'ner is an impact crater on the Moon's far side. It lies to the southeast of the larger crater Van der Waals, and to the north of the Vallis Planck cleft. Pikel'ner overlies more than half of the satellite crater Pikel'ner Y to the north...
.
The outer wall of this crater forms a very nearly circular shape, with only a small crater across the southern rim to break up the symmetry. The interior surfaces form relatively smooth slopes that continue down to the material deposited across the bottom. Apart from the aforementioned impact and a tiny craterlet on the northern edge of the rim, this formation has not been significantly eroded by subsequent impacts.
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 Grotrian.| Grotrian | Latitude | Longitude | Diameter |
|---|---|---|---|
| X | 64.5° S | 125.5° E | 20 km |