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Macrobius (crater)
Encyclopedia
Macrobius is a prominent lunar
impact crater
located to the northwest of the Mare Crisium
. 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.
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...
located to the northwest of the Mare Crisium
Mare Crisium
Mare Crisium is a lunar mare located in the Moon's Crisium basin, just northeast of Mare Tranquillitatis. This basin is of the Pre-Imbrian period, 4.55 to 3.85 billion years ago. This mare is in diameter, and 176,000 km2 in area. It has a very flat floor, with a ring of wrinkled ridges...
. It lies on the southeast edge of the Lacus Bonitatis
Lacus Bonitatis
Lacus Bonitatis is a small lunar mare that lies to the northwest of the prominent crater Macrobius. Further to the north of Lacus Bonitatis is the Montes Taurus mountain range....
, a small lunar mare
Lunar mare
The lunar maria are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions. They were dubbed maria, Latin for "seas", by early astronomers who mistook them for actual seas. They are less reflective than the "highlands" as a result of their iron-rich compositions, and...
. The somewhat smaller crater Tisserand
Tisserand (crater)
Tisserand is a lunar crater that is located just to the east of the larger crater Macrobius, to the northwest of the Mare Crisium.The rim of Tisserand has been eroded by impacts, with depressions in the southern and northeastern sides, and a nearly tangential curving valley cutting into the inner...
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.
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 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
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...
.
- Macrobius A — See CarmichaelCarmichael (crater)Carmichael is a lunar impact crater that is located along the eastern edge of the Sinus Amoris, in the northeastern quadrant of the Moon's near side. It lies within a couple of crater diameters south-southwest of the smaller crater Hill. Further to the east-northeast is the prominent crater Macrobius...
. - Macrobius B — See HillHill (crater)Hill is a small lunar impact crater that is located to the west of the prominent crater Macrobius, near the eastern edge of the Sinus Amoris. This crater was previously designated Macrobius B before being given a name by the IAU...
. - Macrobius D — See FredholmFredholm (crater)Fredholm is a small lunar impact crater that is located in the rugged ground to the west of the Mare Crisium. It lies mid-way between the prominent craters Macrobius to the north and Proclus almost due south....
. - Macrobius L — See EsclangonEsclangon (crater)Esclangon is a lunar crater that is located in the rugged terrain to the northwest of the prominent crater Macrobius, and east of Sinus Amoris. Just to the west-southwest is the crater Hill. Lacus Bonitatis, the Lake of Good, is located to the east and northeast of Esclangon.The interior of this...
.
External links
- LTO-43C2 Macrobius — L&PI topographic mapTopographic mapA topographic map is a type of map characterized by large-scale detail and quantitative representation of relief, usually using contour lines in modern mapping, but historically using a variety of methods. Traditional definitions require a topographic map to show both natural and man-made features...