Lamont (lunar crater)

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Lamont (LRO).png
LRO image of the predominantly submerged crater of Lamont, on the left is Arago and below is a part of Manners
Coordinates5°00′N 23°12′E / 5.0°N 23.2°E / 5.0; 23.2Coordinates: 5°00′N 23°12′E / 5.0°N 23.2°E / 5.0; 23.2
Diameter75 km
Colongitude337° at sunrise
EponymJohann von Lamont

Lamont is a system of low ridges in the surface of Mare Tranquillitatis that is most likely a submerged impact crater. It was named after Scottish-born German astronomer Johann von Lamont.[1] It is located to the southeast of the crater Arago.

Lamont has the shape of two roughly concentric but incomplete rings with an inner diameter of 60 km and an outer diameter of 120 km. (The official diameter is 75 km.) Radial ridges radiate away from the center of Lamont, except in the east and west quadrants. The ridge system is only a few hundred meters in height, with a width that averages 5 km but is thicker to the southeast. This feature is only readily visible at low angles of illumination, when shadows highlight the terrain features.

This feature is associated with a mass concentration (mascon), a sub-surface region of higher-density material.


  1. ^ "Lamont (lunar crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  • Dvorak, J.; Phillips, R. J. (July 28 – August 1, 1975). "Gravity anomaly and structure associated with the Lamont region of the moon". Proceedings of the 10th Lunar and Planetary Science Conference. Houston, Texas: Pergamon Press, Inc. pp. 2265–2275. Bibcode:1979LPSC...10.2265D.
  • 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.
  • 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]

  • Wood, Chuck (December 2, 2007). "A Lost Gem". Lunar Photo of the Day. Archived from the original on December 4, 2007. Retrieved 2007-12-03. Cite uses deprecated parameter |deadurl= (help)