Birt (crater)
Birt is a lunar impact crater located in the eastern half of the Mare Nubium and west of the Rupes Recta. It was named after British selenographer William R. Birt.
Birt is a bowl-shaped formation with a raised rim, slightly intersected along the southeast edge by the much smaller crater Birt A. To the west of Birt, a rille named Rima Birt runs north-northwest in an arc from Birt F to Birt E.
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 Birt.
| Birt | Latitude | Longitude | Diameter |
| A | 22.5° S | 8.2° W | 7 km |
| B | 22.2° S | 10.2° W | 5 km |
| C | 23.7° S | 8.3° W | 2 km |
| D | 21.0° S | 9.8° W | 3 km |
| E | 20.7° S | 9.6° W | 5 km |
| F | 22.3° S | 9.1° W | 3 km |
| G | 23.1° S | 8.2° W | 2 km |
| H | 23.0° S | 9.1° W | 2 km |
| J | 23.0° S | 9.4° W | 2 km |
| K | 22.4° S | 9.7° W | 2 km |
| L | 21.6° S | 9.3° W | 3 km |
