Bohr (crater)

Bohr
Lunar Orbiter 4 image, with Bohr crater in upper right and Vallis Bohr in lower left
Coordinates12°48′N 86°24′W / 12.8°N 86.4°W / 12.8; -86.4
Diameter70.07 km (43.54 mi)[1]
DepthUnknown
Colongitude87° at sunrise
FormationNectarian[2]
EponymNiels Bohr
LRO mosaic

Bohr is a lunar impact crater that is located along the western lunar limb, in the area that is affected by librations.[3] It is attached to the southwestern rim of the larger, eroded Vasco da Gama formation, and to the southeast of the degraded crater Einstein.[4]

This formation is dated to the Nectarian period of the lunar geologic timescale.[2] The rim of Bohr is worn and eroded, and a pair of small, bowl-shaped craters lies across the western inner wall. The rim to the northeast has been shored up by the adjacent Vasco da Gama, but the remainder forms an irregular ring of rugged ground. To the southwest of Bohr is Vallis Bohr, a valley trending in a north–south direction.[5] This long cleft is associated with the formation of the Mare Orientale farther to the south.[6]

This crater is named after Danish physicist Niels Bohr (1885-1962),[7] the 1922 Nobel laurette in Physics.[8] The name was introduced into lunar nomenclature by David W. G. Arthur and Ewen Whitaker with the Rectified Lunar Atlas (1963).[9][10] Its designation was formally adopted by the International Astronomical Union in 1964.[1]

References

  1. 1 2 "Bohr". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  2. 1 2 Byrne, Charles J. (2008). The Far Side of the Moon. Springer. p. 183. ISBN 978-1-4899-8806-5.
  3. ↑ Grego, Peter (2005). The Moon and How to Observe It. Astronomers' Observing Guides Series. London: Springer-Verlag. p. 166. ISBN 1-85233-748-6.
  4. ↑ "LAC 55" (PDF). Gazeteer fo planetary Nomenclature. Retrieved 2026-06-12.
  5. ↑ Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. p. 55. ISBN 978-0-521-81528-4.
  6. ↑ Wilhelms, Don E.; McCauley, John F.; Trask, Newell J. (1987). The geologic history of the Moon. USGS Professional Paper 1348. Washington: U.S. Government Printing Office. p. 3-35. doi:10.3133/pp1348. Figure 3-9.
  7. ↑ Menzel, D. H.; et al. (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. See p. 181.
  8. ↑ "Nobel Prize in Physics 1922". Nobel Foundation. Archived from the original on 17 October 2008. Retrieved 9 October 2008.
  9. ↑ Whitaker, E. A.; et al. (1963). Rectified Lunar Atlas: Supplement No. 2 to the Photographic Lunar Atlas. Tucson: University of Arizona Press. Retrieved 2026-06-01. See Field 10.
  10. ↑ Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. p. 234. ISBN 978-0-521-62248-6.
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