Julius Caesar (crater)

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Julius Caesar
Julius Caesar crater 4090 h1 4090 h2.jpg
Mosiac of Lunar Orbiter 4 images
(White blemishes in lower left are present on original images)
Coordinates9°00′N 15°24′E / 9.0°N 15.4°E / 9.0; 15.4Coordinates: 9°00′N 15°24′E / 9.0°N 15.4°E / 9.0; 15.4
Diameter90 km
Depth3.4 km
Colongitude345° at sunrise
EponymJulius Caesar
Oblique view facing south from Apollo 15
Oblique view facing north from Apollo 12

Julius Caesar is a lava-flooded lunar impact crater with a low, irregular, and heavily worn wall. It is located to the west of Mare Tranquillitatis, and directly more than 175 km southeast of the crater Manilius on the Mare Vaporum. About 35 km east is the rounded Sosigenes and more than 60 km further west is Boscovich.

Its diameter is 90 km long and is 3,400 meters deep. The area is more than 3,000 km² and the perimeter is over 220 km.

The interior floor of Julius Caesar is relatively level, especially in the southwest half. The northern half of the interior has a lower albedo (darker) than the south. Most likely the floor has been covered or modified by ejecta from the impact that created the Imbrium basin. There are a number of crater remnants overlapping the rim along the south and northeast edges. A low ridge crosses the floor across the northeast sections of the 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 Julius Caesar.

Latitude Longitude Diameter
A 7.6° N 14.4° E 13 km
B 9.8° N 14.0° E 7 km
C 7.3° N 15.4° E 5 km
D 7.2° N 16.5° E 5 km
F 11.5° N 12.9° E 19 km
G 10.2° N 15.7° E 20 km
H 8.8° N 13.6° E 3 km
J 9.2° N 14.1° E 3 km
P 11.2° N 14.1° E 37 km
Q 12.9° N 14.0° E 32 km


  • 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.
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  • 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.
  • Wood, Chuck (April 26, 2006). "Dead Romans". Lunar Photo of the Day. Archived from the original on August 26, 2017. Retrieved 2006-07-12.

External links[edit]

Other articles[edit]

  • Wood, Chuck (May 11, 2005). "Imperial Image". Lunar Photo of the Day.
  • Wood, Chuck (December 8, 2009). "Edgy". Lunar Photo of the Day.
  • Wood, Chuck (March 1, 2014). "Smoothered". Lunar Photo of the Day. - also features nearby Boscovich Crater