Römer (crater)
Lunar Orbiter 4 image
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| Coordinates | 25°24′N 36°24′E / 25.4°N 36.4°ECoordinates: 25°24′N 36°24′E / 25.4°N 36.4°E |
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| Diameter | 40 km |
| Depth | 3.3 km |
| Colongitude | 324° at sunrise |
| Eponym | Ole Rømer |
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 inner surface. There is a small craterlet on the north part of the floor, and a large central peak at the midpoint. Römer has a ray system, and due to these rays, it is mapped as part of the Copernican System.
To the northwest of the crater is a prominent system of rilles 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.
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Römer.
The following craters have been renamed by the IAU.
Being located at the 25th parallel north, its view of the Earth is seen at the lunar sky all year round at around 25 degrees facing south from the overhead and at about 36 degrees towards the west from the top.
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Wikipedia