Byrgius (crater)
Byrgius is a lunar impact crater located in the western part of the Moon, near the limb. As a result, Byrgius appears strongly oval in shape due to foreshortening. To the northwest is the nearly ruined crater Lamarck. The rim of Byrgius is worn and eroded, with Byrgius A overlying the eastern rim and Byrgius D lying across the northwest. The floor is relatively flat and undistinguished by significant craters. Byrgius A possesses its own ray system that extends for over 400 kilometres.
Lunar Orbiter 4 image of Byrgius, with Byrgius A at right, and Byrgius D in upper left | |
| Coordinates | 24.7°S 65.3°W |
|---|---|
| Diameter | 87 km |
| Depth | 4.6 km |
| Colongitude | 65° at sunrise |
| Eponym | Joost Bürgi |
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