Timocharis (crater)

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Timocharis from Apollo 15. NASA photo.
Coordinates26°42′N 13°06′W / 26.7°N 13.1°W / 26.7; -13.1Coordinates: 26°42′N 13°06′W / 26.7°N 13.1°W / 26.7; -13.1
Diameter34 km
Depth3.1 km
Colongitude13° at sunrise
Oblique view from Apollo 17 panoramic camera. Note that the central peak has been modified by a superposed crater.
The east side of Timocharis while at the lunar terminator, from Apollo 15.

Timocharis is a prominent lunar impact crater located on the Mare Imbrium. The closest crater of comparable dimensions is Lambert to the west. The smaller craters Feuillée and Beer lie to the east of Timocharis.

The rim of Timocharis has a somewhat polygonal outline, with an outer rampart that extends over 20 kilometers in all directions. The interior wall is slumped and sharply terraced. The center of the floor is occupied by a craterlet that lies on a slight rise. This impact has almost completely removed the original central peak. The crater may have a minor ray system that extends for over 130 km (81 mi). The lack of prominent rays puts the age of this crater at about a billion years or more.

To the north of Timocharis is a tiny crater chain named the Catena Timocharis.


The crater is named after Timocharis. Like many of the craters on the Moon's near side, it was given its name by Giovanni Riccioli, whose 1651 nomenclature system has become standardized.[1] Earlier lunar cartographers had given the feature different names. Michael van Langren's 1645 map calls it "Gassendi" after Pierre Gassendi;[2] that name is now used for a crater in the northern edge of Mare Humorum in the lunar Southern Hemisphere. Also Langren mapped the name as "Timochari" in the north of Mare Astronomicum (Sea of Astronomy), now Mare Frigoris located around the Prime Meridian,[2] that crater is now Timaeus.

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 Timocharis.

Timocharis Latitude Longitude Diameter
B 27.9° N 12.1° W 33.5 km
C 24.8° N 14.2° W 33.2 km
D 23.8° N 15.1° W 32.7 km
E 24.6° N 17.1° W 32.6 km
H 23.6° N 16.6° W 32.1 km

The following craters have been renamed by the IAU.


  1. ^ Ewen A. Whitaker, Mapping and Naming the Moon (Cambridge University Press, 1999), p.61.
  2. ^ a b Ewen A. Whitaker, Mapping and Naming the Moon (Cambridge University Press, 1999), p. 198.


  • 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.
  • 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]