&sq=Envato&lang=en&file=File:Fermat_crater_4089_h1.jpg) Lunar Orbiter 4 image | |
| Coordinates | 22°43′S 19°47′E / 22.71°S 19.79°E |
|---|---|
| Diameter | 37.77 km |
| Depth | 2.0 km |
| Colongitude | 20° at sunrise |
| Eponym | Pierre de Fermat |
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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]
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]
- ^ a b c Autostar Suite Astronomer Edition. CD-ROM. Meade, April 2006.
- ^ Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 0-913135-17-8.
- ^ "Fermat (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.