Billy (crater)
 Lunar Orbiter 4 image (spots at upper right are blemishes on original) | |
| Coordinates | 13°48′S 50°06′W / 13.8°S 50.1°W |
|---|---|
| Diameter | 45 km |
| Depth | 1.2 km |
| Colongitude | 50° at sunrise |
| Eponym | Jacques de Billy |
Billy is a lunar impact crater that is located at the southern fringes of the Oceanus Procellarum, in the western hemisphere of the Moon. It was named after French mathematician Jacques de Billy.[1] It lies to the southeast of the similar-sized crater Hansteen, and west-southwest of the flooded Letronne.
The interior floor of Billy has been flooded by basaltic lava, leaving a dark surface due to the low albedo. The portion of the rim remaining above the surface is narrow and low, with a thin inner wall. Only a few tiny craterlets mark the interior.
To the north of the crater is a triangular mountainous formation named Mons Hansteen, from the nearby crater. Southeast of Billy is a rille, designated Rima Billy, that runs 70 kilometers to the south.
Satellite craters[edit]
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Billy.
| Billy | Latitude | Longitude | Diameter |
|---|---|---|---|
| A | 14.3° S | 46.3° W | 7 km |
| B | 12.2° S | 47.6° W | 25 km |
| C | 16.1° S | 49.0° W | 6 km |
| D | 14.9° S | 48.3° W | 11 km |
| E | 15.0° S | 49.6° W | 2 km |
| H | 15.6° S | 49.6° W | 3 km |
| K | 12.9° S | 48.7° W | 4 km |
References[edit]
- ^ "Billy (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
- 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.
External links[edit]
- "Dark lava floor of crater Billy seen by SMART-1". ESA. Retrieved March 31, 2006.
