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Cleomedes is a prominent lunar impact crater located in the northeast part of the visible Moon, to the north of Mare Crisium. It was named after Greek astronomer Cleomedes.[1] It is surrounded by rough ground with multiple crater impacts. The irregular crater Tralles intrudes into the northwest rim. To the east is Delmotte. North of Cleomedes is a triple-crater formation with Burckhardt occupying the center.

Cleomedes crater LROC.jpg
LRO mosaic
Coordinates27°42′N 55°30′E / 27.7°N 55.5°E / 27.7; 55.5Coordinates: 27°42′N 55°30′E / 27.7°N 55.5°E / 27.7; 55.5
Diameter126 km
Depth2.7 km
Colongitude304° at sunrise
Oblique Lunar Orbiter 4 image

The outer wall of Cleomedes is heavily worn and eroded, especially along the southern part of the wall. Cleomedes C lies across the south-southwest rim. The crater floor is nearly flat, with a small central peak to the north of the midpoint, forming a linear ridge toward the north-northeast. There are several notable craterlets on the floor, including a pair of overlapping craters just inside the northwest rim.

A rille named Rima Cleomedes crosses the northern floor, running southeast from the northwest rim. This rille branches in a fork after crossing the crater mid-line. Smaller clefts lie in the southeast part of the floor.

Satellite cratersEdit

By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Cleomedes.

Cleomedes Latitude Longitude Diameter
A 28.9° N 55.0° E 12 km
B 27.2° N 55.9° E 11 km
C 25.7° N 54.9° E 14 km
D 29.3° N 61.9° E 25 km
E 28.6° N 54.4° E 21 km
F 22.6° N 56.9° E 12 km
G 24.0° N 57.3° E 20 km
H 22.4° N 57.6° E 6 km
J 26.9° N 56.8° E 10 km
L 23.8° N 54.4° E 7 km
M 24.2° N 51.6° E 6 km
N 24.8° N 52.5° E 6 km
P 24.8° N 56.4° E 9 km
Q 24.9° N 56.9° E 4 km
R 29.5° N 60.2° E 15 km
S 29.5° N 59.0° E 8 km
T 25.8° N 57.7° E 11 km


  1. ^ "Cleomedes (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  • Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
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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.
  • 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 linksEdit