Protagoras (crater)
 Lunar Orbiter 4 image | |
| Coordinates | 56°00′N 7°18′E / 56.0°N 7.3°E |
|---|---|
| Diameter | 22 km |
| Depth | 2.1 km |
| Colongitude | 353° at sunrise |
| Eponym | Protagoras |
Protagoras is a lunar impact crater that is located on the Mare Frigoris in the northern part of the Moon. To the north-northwest is the slightly larger crater Archytas, and to the southeast is the prominent Aristoteles.
The rim of Protagoras is circular and rises above the surrounding flat terrain, although the rim dips down along the southwestern edge. The interior floor contains a few light markings but no formations of interest. There is an area of rough terrain just to the east of this crater, but the surroundings are otherwise level with only a few small craters in the vicinity.
The crater is named for the Greek sophist Protagoras of Abdera.
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 Protagoras.
| Protagoras | Latitude | Longitude | Diameter |
|---|---|---|---|
| B | 56.3° N | 5.7° E | 4 km |
| E | 49.5° N | 0.5° E | 6 km |
References
- Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
{{cite book}}: Invalid|ref=harv(help) - Blue, Jennifer (July 25, 2007). "Gazetteer of Planetary Nomenclature". USGS. Retrieved 2007-08-05.
{{cite web}}: Invalid|ref=harv(help) - Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.
{{cite book}}: Invalid|ref=harv(help) - Cocks, Elijah E.; Cocks, Josiah C. (1995). Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature. Tudor Publishers. ISBN 978-0-936389-27-1.
{{cite book}}: Invalid|ref=harv(help) - McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. Retrieved 2007-10-24.
{{cite web}}: Invalid|ref=harv(help) - 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.
{{cite journal}}: Invalid|ref=harv(help) - Moore, Patrick (2001). On the Moon. Sterling Publishing Co. ISBN 978-0-304-35469-6.
{{cite book}}: Invalid|ref=harv(help) - Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 978-0-521-33500-3.
{{cite book}}: Invalid|ref=harv(help) - Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 978-0-913135-17-4.
{{cite book}}: Invalid|ref=harv(help) - Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes (6th revised ed.). Dover. ISBN 978-0-486-20917-3.
{{cite book}}: Invalid|ref=harv(help) - Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 978-0-521-62248-6.
{{cite book}}: Invalid|ref=harv(help) - Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.
{{cite book}}: Invalid|ref=harv(help)