Hedin (crater)
Encyclopedia
Hedin is a lunar
crater
of the dimension traditionally termed a walled plain. It lies due south of the crater pair Olbers
and Glushko
, and northwest of the similarly dimensioned walled plain Riccioli
. To the east is another walled plain, Hevelius
.
This crater has a deteriorated outer rim that has been worn down and reshaped through impact erosion. Several small craters lie along or near the rim, including Hedin F to the northeast and Hedin H to the southeast.
The interior floor has been scored by the impact event that created the Mare Orientale
to the southeast. But these features are cross-hatched by a pair of linear rille
s that follow a path towards the southeast. Only a section of the floor along the northwest rim is relatively level, retaining the low albedo
of ground that has been resurfaced by lava
.
This crater is sometimes referred to as "Sven Hedin" in older publications.
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...
of the dimension traditionally termed a walled plain. It lies due south of the crater pair Olbers
Olbers (crater)
Olbers is a lunar crater that lies at the west edge of the Oceanus Procellarum, near the western limb of the Moon. It lies to the northwest of the crater Hevelius, and to the north of the indistinct Hedin. Farther to the south is the crater Riccioli. Due to its location, this crater appears very...
and Glushko
Glushko (crater)
Glushko is a young impact crater on the Moon attached to the western rim of the crater Olbers.Glushko possesses a relatively high albedo and is the focus of a prominent ray system that extends in all directions across the nearby surface. It has sharp, well-defined features that, combined with its...
, and northwest of the similarly dimensioned walled plain Riccioli
Riccioli (crater)
Riccioli is a large lunar impact crater located near the western limb of the Moon. It lies just to the northwest of the even larger and more prominent crater Grimaldi. To the southwest are the craters Hartwig and Schlüter that lie on the northeastern edge of Montes Cordillera, the ring-shaped range...
. To the east is another walled plain, Hevelius
Hevelius (crater)
Hevelius is a low-rimmed lunar crater that lies at the western edge of the Oceanus Procellarum, named after Johannes Hevelius. The smaller but prominent crater Cavalerius is joined to the northern rim by low ridges. Due south of Hevelius is the crater Lohrmann and the dark-hued Grimaldi.Only a low,...
.
This crater has a deteriorated outer rim that has been worn down and reshaped through impact erosion. Several small craters lie along or near the rim, including Hedin F to the northeast and Hedin H to the southeast.
The interior floor has been scored by the impact event that created 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...
to the southeast. But these features are cross-hatched by a pair of linear rille
Rille
Rille is typically used to describe any of the long, narrow depressions in the lunar surface that resemble channels. Typically a rille can be up to several kilometers wide and hundreds of kilometers in length...
s that follow a path towards the southeast. Only a section of the floor along the northwest rim is relatively level, retaining the low 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...
of ground that has been resurfaced by 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...
.
This crater is sometimes referred to as "Sven Hedin" in older publications.
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 Hedin.| Hedin | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 5.5° N | 78.1° W | 60 km |
| B | 4.4° N | 83.7° W | 20 km |
| C | 4.4° N | 84.6° W | 10 km |
| F | 4.0° N | 74.4° W | 19 km |
| G | 3.8° N | 73.4° W | 14 km |
| H | 3.0° N | 72.2° W | 11 km |
| K | 2.9° N | 73.0° W | 11 km |
| L | 5.1° N | 71.3° W | 10 km |
| N | 4.9° N | 71.7° W | 24 km |
| R | 5.3° N | 75.9° W | 7 km |
| S | 5.7° N | 75.1° W | 8 km |
| T | 4.2° N | 72.8° W | 7 km |
| V | 5.2° N | 73.7° W | 9 km |
| Z | 1.9° N | 78.9° W | 10 km |