) Oblique Apollo 17 image | |
| Coordinates | 13°48′S 179°48′W / 13.8°S 179.8°W |
|---|---|
| Diameter | 63 km |
| Depth | Unknown |
| Colongitude | 180° at sunrise |
| Eponym | Giulio Racah |
)
Racah is a lunar impact crater on the far side of the moon. It lies almost due south of the larger crater Daedalus, and lies across lunar longitude 180°W, i.e. the longitude that is diametrically opposite to the Earth. To the west-southwest of Racah is the crater Aitken, and to the southeast lies De Vries.
The rim of this crater is eroded and is not quite circular, having a prominent outward bulge along the west-northwest side. The edge is somewhat damaged along the southern rim, but no significant craters lie along the side. The interior floor is uneven in places with some small impacts.
This feature is named after the Israeli physicist Giulio Racah.
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 Racah.
| Racah | Latitude | Longitude | Diameter |
|---|---|---|---|
| B | 10.5° S | 178.4° W | 27 km |
| J | 16.5° S | 177.4° W | 37 km |
| K | 16.8° S | 178.6° W | 52 km |
| N | 17.0° S | 179.0° E | 35 km |
| T | 13.8° S | 177.5° E | 21 km |
| U | 13.2° S | 177.2° E | 25 km |
| W | 12.5° S | 178.9° E | 39 km |
| X | 10.2° S | 179.0° E | 14 km |
References
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- Blue, Jennifer (July 25, 2007). "Gazetteer of Planetary Nomenclature". USGS. Retrieved 2007-08-05.
- Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.
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- Menzel, D. H.; Minnaert, M.; Levin, B.; Dollfus, A.; Bell, B. (1971). "Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU". Space Science Reviews. 12 (2): 136–186. Bibcode:1971SSRv...12..136M. doi:10.1007/BF00171763.
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- Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 978-0-521-62248-6.
- Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.