Fermat (crater)
Template:Short description Template:Infobox Lunar crater
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.<ref name="a">Autostar Suite Astronomer Edition. CD-ROM. Meade, April 2006.</ref>
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.<ref>Template:Cite book</ref> The crater is from the Pre-Imbrian period, 4.55 to 3.85 billion years ago.<ref name="a"/>
It is named for 17th century French mathematician Pierre de Fermat.<ref>Template:Gpn</ref><ref name="a"/>
Satellite craters
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.<ref>Template:Cite book</ref>
| Fermat | Coordinates | Diameter |
|---|---|---|
| A | Template:Coord | 17 km |
| B | Template:Coord | 11 km |
| C | Template:Coord | 14 km |
| D | Template:Coord | 13 km |
| E | Template:Coord | 7 km |
| F | Template:Coord | 5 km |
| G | Template:Coord | 7 km |
| H | Template:Coord | 5 km |
| P | Template:Coord | 37 km |