Millikan is a lunar impact crater in the northern hemisphere of the Moon's far side. It is located to the north of the crater H. G. Wells, and to the southwest of von Békésy.
 Clementine mosaic | |
| Coordinates | 46°46′N 121°31′E / 46.76°N 121.52°E |
|---|---|
| Diameter | 93.97 km (58.39 mi) |
| Depth | Unknown |
| Colongitude | 240° at sunrise |
| Eponym | Robert A. Millikan |
This formation dates to the Nectarian epoch of the lunar geologic timescale.[1] The rim edge of Millikan is roughly circular and well-defined, but with some irregularities. There are some small outward bulges along the south and east where the edge has slumped inwards somewhat. The inner walls lacks a terrace structure that is seen, for example, in the smaller Cantor to the south.
The interior floor of Millikan is relatively level, and there is a small, bowl-shaped crater to the north of the midpoint. Offset to the west of the middle is a low central peak. The floor is marked by a number of tiny craterlets.
Prior to formal naming by the IAU in 1970,[2] Millikan was called Crater 47.[3]
Satellite craters
editBy convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Millikan.
| Millikan | Latitude | Longitude | Diameter |
|---|---|---|---|
| B | 49.8° N | 123.5° E | 21 km |
| J | 45.8° N | 124.6° E | 36 km |
| Q | 43.9° N | 118.6° E | 33 km |
| R | 46.0° N | 117.7° E | 49 km |
References
edit- ↑ Tompkins, Stefanie; Pieters, Carle M. (January 1999). "Mineralogy of the lunar crust: Results from Clementine". Meteoritics & Planetary Science. 34 (1): 25–41. Bibcode:1999M&PS...34...25T. doi:10.1111/j.1945-5100.1999.tb01729.x.
- ↑ Millikan, Gazetteer of Planetary Nomenclature, International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN)
- ↑ Lunar Farside Chart (LFC-1A), 2nd Edition October 1967
Sources
edit- Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
- 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.
- 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. Archived from the original on 2012-02-08. 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.
{{cite book}}: ISBN / Date incompatibility (help) - 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.