 Lunar Orbiter 4 image | |
| Coordinates | 22°54′S 69°48′W / 22.9°S 69.8°W |
|---|---|
| Diameter | 100 km |
| Depth | 2.8 km |
| Colongitude | 72° at sunrise |
| Eponym | Jean-Baptiste Lamarck |
Lamarck is a crater in the southwestern part of the Moon. The northern portion of the crater is overlain by the walled plain Darwin. To the southeast is Byrgius.
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 overlain 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 southwestern 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.
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 Lamarck.
| 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 |
-
Lamarck D
References[edit]
- 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 2007-08-05.
- 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.
- Moore, Patrick (2001). On the Moon. Sterling Publishing Co. ISBN 978-0-304-35469-6.
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- 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.