Lamarck (crater)

From Wikipedia, the free encyclopedia

Crater characteristics
Coordinates	22.9° S, 69.8° W
Diameter	100 km
Depth	2.8 km
Colongitude	72° at sunrise
Eponym	Jean-Baptiste Lamarck

Lamarck is a lunar crater in the southwest part of the Moon. The northern portion of the crater is overlaid by the Darwin walled plain. To the southeast is Byrgius crater.

The outer wall of this formation has been heavily damaged by subsequent impacts, leaving a disintegrated rim that forms a low, irregular ridge in the surface. Parts of the crater are also overlaid by ejecta from the Mare Orientale basin to the east. The most notable feature in the interior is the tiny, bowl-shaped impact crater 'Lamarck B'. The remainder of the floor forms a rolling, uneven plain.

Attached to the southwest rim is 'Lamarck A', a large but equally disintegrated crater. 'Lamarck D' is a huge formation that lies to the west of 'Lamarck A'. However this last feature is also worn to the point where it is barely recognizable as a crater.

[edit] 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 Alder crater.

Lamarck	Latitude	Longitude	Diameter
A	25.2° S	70.8° W	51 km
B	22.8° S	69.7° W	7 km
D	25.0° S	74.1° W	131 km
E	26.8° S	75.7° W	9 km
F	27.0° S	73.9° W	9 km
G	27.1° S	72.1° W	15 km

[edit] 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. ISBN 0521335000. 
• 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.