Macrobius (crater)
Template:Infobox Lunar crater Macrobius is a prominent lunar impact crater located to the northwest of the Mare Crisium. Its diameter is 63 km. It was named after ancient Roman writer Macrobius.<ref>Template:Gpn</ref> It lies on the southeast edge of the Lacus Bonitatis, a small lunar mare. The somewhat smaller crater Tisserand lies just to the east.
The outer wall of Macrobius has a multiply terraced inner surface, with some slumping along the top of the rim. The small satellite crater Macrobius C lies across the western rim, but the wall is otherwise relatively free of significant wear. In the center of the floor is a central mountain complex. There is a low ridge in the western interior, but the remainder of the floor is relatively level.
Macrobius is a crater of Lower (Early) Imbrian age.<ref>The geologic history of the Moon. USGS Professional Paper 1348. By Don E. Wilhelms, John F. McCauley, and Newell J. Trask. U.S. Government Printing Office, Washington: 1987. Table 10.2.</ref>
Satellite cratersEdit
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Macrobius.
| Macrobius | Latitude | Longitude | Diameter |
|---|---|---|---|
| C | 20.8° N | 45.0° E | 10 km |
| E | 18.7° N | 46.8° E | 10 km |
| F | 22.5° N | 48.5° E | 11 km |
| K | 21.5° N | 40.2° E | 12 km |
| M | 25.0° N | 41.0° E | 42 km |
| N | 22.8° N | 40.8° E | 5 km |
| P | 23.0° N | 39.5° E | 18 km |
| Q | 20.4° N | 47.6° E | 9 km |
| S | 23.3° N | 49.6° E | 26 km |
| T | 23.8° N | 48.6° E | 29 km |
| U | 25.0° N | 42.8° E | 6 km |
| V | 25.4° N | 43.3° E | 5 km |
| W | 24.8° N | 44.6° E | 26 km |
| X | 23.0° N | 42.2° E | 4 km |
| Y | 23.6° N | 42.2° E | 5 km |
| Z | 24.3° N | 42.6° E | 5 km |
The following craters have been renamed by the IAU.
- Macrobius A — See Carmichael.
- Macrobius B — See Hill.
- Macrobius D — See Fredholm.
- Macrobius L — See Esclangon.
ReferencesEdit
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