Römer (crater)
Encyclopedia
Römer is a lunar
impact crater
that is located to the north of the Sinus Amoris
in the northeast section of the Moon
. It lies in the southwestern part of the mountainous region named the Montes Taurus
. To the west-northwest is the crater-bay Le Monnier
, on the eastern edge of Mare Serenitatis
.
The rim of Römer has relatively high walls with a terraced inner surface. There is a small craterlet on the north part of the floor, and a large central peak at the mid-point.
To the northwest of the crater is a prominent system of rille
s named the Rimae Römer. These follow a course to the north from the western rim of the crater, and have a combined length of about 110 kilometres.
The following craters have been renamed by the IAU
.
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 to the north of the Sinus Amoris
Sinus Amoris
Sinus Amoris extends northward from the northeast end of the Mare Tranquillitatis. It is located at selenographic coordinates 18.1° N, 39.1° E, and lies within a diameter of 130 km. To the north of the bay are the jumbled Montes Taurus peaks.Near the southern end of the bay where it outlets...
in the northeast section 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 in the southwestern part of the mountainous region named the Montes Taurus
Montes Taurus
Montes Taurus is a rugged, jumbled mountainous region on the Moon. These peaks are located on a highland region to the east of the Mare Serenitatis, in the northeastern quadrant of the Moon's near side. The selenographic coordinates of this range are 28.4° N, 41.1° E, and they have a diameter of...
. To the west-northwest is the crater-bay Le Monnier
Le Monnier (crater)
Le Monnier is the remnant of a lunar crater that has been partly inundated by lava flows. It is located on the eastern edge of Mare Serenitatis, and the western part of the rim is missing so that it now forms a large bay. To the north is the crater Chacornac....
, on the eastern edge of Mare Serenitatis
Mare Serenitatis
Mare Serenitatis is a lunar mare that sits just to the east of Mare Imbrium on the Moon.It is located within the Serenitatis basin, which is of the Nectarian epoch. The material surrounding the mare is of the Lower Imbrian epoch, while the mare material is of the Upper Imbrian epoch...
.
The rim of Römer has relatively high walls with a terraced inner surface. There is a small craterlet on the north part of the floor, and a large central peak at the mid-point.
To the northwest of the crater is a prominent system of 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 named the Rimae Römer. These follow a course to the north from the western rim of the crater, and have a combined length of about 110 kilometres.
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 Römer.| Römer | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 28.1° N | 37.1° E | 35 km |
| B | 28.6° N | 38.2° E | 20 km |
| C | 27.7° N | 37.0° E | 8 km |
| D | 24.5° N | 35.8° E | 13 km |
| E | 28.5° N | 39.2° E | 31 km |
| F | 27.1° N | 37.2° E | 22 km |
| G | 26.8° N | 36.2° E | 14 km |
| H | 25.9° N | 35.7° E | 6 km |
| J | 22.4° N | 37.9° E | 8 km |
| M | 25.3° N | 34.6° E | 10 km |
| N | 25.3° N | 38.0° E | 26 km |
| P | 26.5° N | 39.6° E | 61 km |
| R | 24.2° N | 34.6° E | 42 km |
| S | 24.9° N | 36.8° E | 44 km |
| T | 23.6° N | 36.1° E | 47 km |
| U | 24.3° N | 39.1° E | 28 km |
| V | 24.5° N | 38.6° E | 28 km |
| W | 26.4° N | 40.4° E | 7 km |
| X | 24.3° N | 40.1° E | 22 km |
| Y | 25.7° N | 36.3° E | 7 km |
| Z | 24.1° N | 36.9° E | 12 km |
The following craters have been renamed by the IAU
International Astronomical Union
The International Astronomical Union IAU is a collection of professional astronomers, at the Ph.D. level and beyond, active in professional research and education in astronomy...
.
- Römer K — See Franck (crater)Franck (crater)Franck is a small lunar impact crater that lies near the north end of Sinus Amoris, a bay on the northern part of Mare Tranquillitatis. The crater lies just to the southeast of Brewster, and farther to the south of Römer...
. - Römer L — See Brewster (crater)Brewster (crater)Brewster is a small lunar impact crater in the northern fringes of Sinus Amoris. It lies to the southwest of the larger crater Römer. To the southeast of Brewster is the similar-sized Franck. This crater is cup-shaped and symmetrical, with no overlapping craters of note. A low ridge is attached to...
.