Lyman (crater)

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Crater characteristics
Coordinates	64.8° S, 163.6° E
Diameter	84 km
Depth	Unknown
Colongitude	160° at sunrise
Eponym	Theodore Lyman

Lyman is a lunar impact crater that lies in the southern hemisphere on the far side of the Moon. It is located to the south of the huge Poincaré walled plain, and to the northeast of the Schrödinger walled plain. To the east-southeast is the larger Minnaert crater.

The rim of Lyman has not been significantly worn and has a well-defined edge and interior features that have not been eroded through impacts. The perimeter is roughly circular with outward bulges along the southern and eastern edges where slumping has occurred. Around much of the interior edge the unconsolidated material has collapsed, forming a ring-shaped pile around the edge of the interior floor. There are a few terraces along parts of the inner wall.

The interior floor of Lyman crater is relatively level with a few minor ridges and a small number of tiny craterlets. At the mid-point of the interior floor is a central peak formation. This consists of a main peak with attached foothills to the north and northeast. This formation of ridges occupies a diameter of over 10 kilometers.

[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 Lyman crater.

Lyman	Latitude	Longitude	Diameter
P	67.6° S	158.5° E	14 km
Q	68.6° S	156.7° E	56 km
T	64.1° S	157.7° E	59 km
V	62.6° S	154.2° E	37 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.