Millikan (crater)

Crater on the Moon

Feature on the moon

Millikan

Clementine mosaic

Coordinates| 46°46′N 121°31′E﻿ / ﻿46.76°N 121.52°E﻿ / 46.76; 121.52
Diameter| 93.97 km (58.39 mi)
Depth| Unknown
Colongitude| 240° at sunrise
Eponym| Robert A. Millikan
Oblique Lunar Orbiter 5 image, facing west Oblique Apollo 16 mapping camera image

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.

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 also marked by a number of tiny craterlets.

Prior to formal naming by the IAU in 1970,[1] Millikan was called Crater 47.[2]

## 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 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

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1. ^ Millikan, Gazetteer of Planetary Nomenclature, International Astronomical Union (IAU) Working Group for Planetary System Nomenclature (WGPSN)
2. ^ Lunar Farside Chart (LFC-1A), 2nd Edition October 1967

* Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
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* 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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* 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.
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* 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.