Saunder (crater)
Encyclopedia
Saunder is a lunar
crater
located in the central highland region of the Moon
, to the east-northeast of the walled plain Hipparchus
. The outer wall is irregular and broken in several locations, forming the overall shape of a pentagon
. The interior of Saunder has been flooded with lava, forming a level surface just below the rim. The floor lacks a central peak, but there are low rises in the southeast quadrant and a tiny craterlet towards the north 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...
located in the central highland region 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...
, to the east-northeast of the walled plain Hipparchus
Hipparchus (lunar crater)
Hipparchus is the degraded remnant of a lunar crater. It is located to the southeast of Sinus Medii, near the center of the visible Moon. To the south is the prominent crater Albategnius, and to the southwest lies Ptolemaeus, a feature of comparable dimensions to Hipparchus. Horrocks lies entirely...
. The outer wall is irregular and broken in several locations, forming the overall shape of a pentagon
Pentagon
In geometry, a pentagon is any five-sided polygon. A pentagon may be simple or self-intersecting. The sum of the internal angles in a simple pentagon is 540°. A pentagram is an example of a self-intersecting pentagon.- Regular pentagons :In a regular pentagon, all sides are equal in length and...
. The interior of Saunder has been flooded with lava, forming a level surface just below the rim. The floor lacks a central peak, but there are low rises in the southeast quadrant and a tiny craterlet towards the north 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 Saunder.| Saunder | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 4.0° S | 12.3° E | 8 km |
| B | 3.9° S | 9.8° E | 6 km |
| C | 2.7° S | 10.5° E | 4 km |
| S | 2.3° S | 9.7° E | 4 km |
| T | 4.0° S | 10.4° E | 6 km |