Lambert (lunar crater)

Crater characteristics
Lambert from Apollo 15. NASA photo.
Coordinates	25.8° N, 21.0° W
Diameter	30 km
Depth	2.7 km
Colongitude	21° at sunrise
Eponym	Johann H. Lambert

Lambert is a lunar impact crater on the southern half of the Mare Imbrium basin. It lies to the east and somewhat south of the slightly larger Timocharis crater. To the south is the smaller Pytheas crater, and some distance to the west-southwest is the Euler crater. The crater is relatively easy to locate due to its isolated position on the mare. It has an outer rampart, terraced inner walls, and a rough interior that has a comparable albedo to its surroundings. Instead of a central peak, a small craterler lies at the mid-point of the interior. Just to the south of the Lambert crater ramparts is the lava-covered rim of a crater that is almost completely covered by the mare. The diameter of this ghost-crater is slightly larger than Lambert, but it is difficult to spot except when the sun is at a very low angle. The feature is designated 'Lambert R'.

Satellite craters

By convention these features are identified on lunar maps by placing the letter on the side of the crater mid-point that is closest to Lambert crater.

References

• 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 on 2007-08-05.
• Bussey, B.; Spudis, P., (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 0-521-81528-2. 
• Cocks, Elijah E.; Cocks, Josiah C. (1995). Who's Who on the Moon: A Biographical Dictionary of Lunar Nomenclature. Tudor Publishers. ISBN 0-936389-27-3. 
• McDowell, Jonathan (July 15, 2007). Lunar Nomenclature. Jonathan's Space Report. Retrieved on 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: 136.
• Moore, Patrick (2001). On the Moon. Sterling Publishing Co.. ISBN 0-304-35469-4. 
• Price, Fred W. (1988). The Moon observer's handbook. Cambridge University Press. 
• Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 0-913135-17-8. 
• Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes, 6th revision, Dover. ISBN 0-486-20917-2. 
• Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 0-521-62248-4. 
• Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 1852331933. 

External links

• LTO-40A3 Lambert — L&PI topographic map of crater and vicinity.