De Morgan (crater)

De Morgan
Lunar Orbiter 4 image
Coordinates3°18′N 14°54′E / 3.3°N 14.9°E / 3.3; 14.9
Diameter9.68 km (6.01 mi)[1]
Depth1.87 km (1.16 mi)[2]
Colongitude345° at sunrise
EponymAugustus De Morgan

De Morgan is a small lunar impact crater that is located in the central region of the Moon, midway between the crater D'Arrest two crater diameters to the south, and Cayley to the north.[3][4] This crater is circular and bowl-shaped, with a small interior floor at the midpoint between the conical, sloping inner wall.[5] Its diameter is 9.7 km[1] and it is nearly 1.9 km deep.[6] Spectral and chemical data from the Clementine mission indicate this impact did not excavate any cryptomare material.[7]

This formation is named after British mathematician and logician Augustus De Morgan (1806-1871).[1] His name was included in the lunar nomenclature of W. William R. Birt and John Lee during the 19th century.[8] Its designation was officially adopted by the International Astronomical Union in 1935.[1]

Clementine image of De Morgan crater

References

  1. 1 2 3 4 "De Morgan". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program. Retrieved 2026-07-30.
  2. ↑ Joshi, Maitri P. (February 2017). "Physical properties of lunar craters". Research in Astronomy and Astrophysics. 17 (3). id. 24. Bibcode:2017RAA....17...24J. doi:10.1088/1674-4527/17/3/24.
  3. ↑ Moore, Patrick (2001). On the Moon. Sterling Publishing Co. p. 175–176. ISBN 978-0-304-35469-6.
  4. ↑ "LAC 60" (PDF). Gazeteer of Planetary Nomenclature. Retrieved 2026-07-30.
  5. ↑ Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. p. 60. ISBN 978-0-521-81528-4.
  6. ↑ Wood, Chuck (June 14, 2011). "How Deep is That Hole". Lunar Photo of the Day. Archived from the original on 2011-06-14. Retrieved 2011-06-14. - includes a couple of craters such as De Morgan (sometimes as de Morgan)
  7. ↑ Giguere, T. A.; et al. (June 2006). "Remote sensing studies of the Dionysius region of the Moon". Journal of Geophysical Research. 111 (E6) E06009. Bibcode:2006JGRE..111.6009G. doi:10.1029/2005JE002639.
  8. ↑ Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. pp. 136, 221. ISBN 978-0-521-62248-6.

Sources

  • 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.
  • Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.
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