 Lunar Orbiter 4 image | |
| Coordinates | 33°17′S 21°11′W / 33.29°S 21.18°W |
|---|---|
| Diameter | 39.18 km |
| Depth | 2.8 km |
| Colongitude | 21° at sunrise |
| Eponym | Cecco d'Ascoli |
Cichus is a lunar impact crater that lies in the southwestern part of the Moon, at the eastern edge of Palus Epidemiarum. Just to the northeast and nearly contacting the rim is the lava-flooded crater remnant Weiss. The crater is named after Italian astronomer Cecco d'Ascoli.[1]
The rim of this crater is only slightly worn, although the crater Cichus C lies across the southwestern rim. Sections of the inner wall are terraced, and the western side is somewhat wider than in the east. Several small ridges lie across the interior floor. A ray from the bright crater Tycho to the southeast passes tangentially just to the northeast of the rim.
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 Cichus.
| Cichus | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 34.8° S | 21.4° W | 21 km |
| B | 33.2° S | 19.3° W | 14 km |
| C | 33.5° S | 21.8° W | 11 km |
| F | 35.7° S | 22.4° W | 8 km |
| G | 35.5° S | 23.5° W | 23 km |
| H | 32.8° S | 22.4° W | 7 km |
| J | 32.0° S | 21.3° W | 13 km |
| K | 36.6° S | 19.9° W | 6 km |
| N | 30.5° S | 21.7° W | 8 km |
References
- ↑ "Gazetteer of Planetary Nomenclature | Cichus". usgs.gov. International Astronomical Union. Retrieved September 8, 2017.
- Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
- Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.
- 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.
- McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. Retrieved 2007-10-24.
- 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. S2CID 122125855.
- Moore, Patrick (2001). On the Moon. Sterling Publishing Co. ISBN 978-0-304-35469-6.
- Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 978-0-521-33500-3.
- Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 978-0-913135-17-4.
- Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes (6th revised ed.). Dover. ISBN 978-0-486-20917-3.
- 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.
