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Crater on the Moon From Wikipedia, the free encyclopedia
Fermat is a lunar impact crater located to the west of the Rupes Altai escarpment. To the west-southwest is the larger crater Sacrobosco, and to the southwest is the irregular Pons. It is 39 kilometers in diameter and two kilometers deep.[1]
Coordinates | 22.71°S 19.79°E |
---|---|
Diameter | 37.77 km |
Depth | 2.0 km |
Colongitude | 20° at sunrise |
Eponym | Pierre de Fermat |
The rim of Fermat is worn and somewhat irregular, but still possesses an outer rampart. The north rim is indented by a double crater formation that includes Fermat A. The floor is relatively flat and does not have a central rise.[2] The crater is from the Pre-Imbrian period, 4.55 to 3.85 billion years ago.[1]
It is named for 17th century French mathematician Pierre de Fermat.[3][1]
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Fermat.[4]
Fermat | Coordinates | Diameter |
---|---|---|
A | 21.8°S 19.6°E | 17 km |
B | 23.0°S 21.1°E | 11 km |
C | 21.0°S 18.5°E | 14 km |
D | 20.1°S 18.0°E | 13 km |
E | 19.9°S 19.9°E | 7 km |
F | 22.1°S 20.2°E | 5 km |
G | 19.4°S 20.0°E | 7 km |
H | 23.1°S 20.7°E | 5 km |
P | 23.6°S 19.3°E | 37 km |
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