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Gregory is a lunar impact crater on the far side of the Moon. It is named after the 17th century Scottish astronomer and mathematician James Gregory.[1] It is located to the southeast of the crater Ibn Firnas, and north-northeast of Bečvář. About one crater diameter to the north is the smaller Morozov.

Gregory crater AS16-M-0073.jpg
Apollo 16 Mapping Camera image
Coordinates2°12′N 127°12′E / 2.2°N 127.2°E / 2.2; 127.2Coordinates: 2°12′N 127°12′E / 2.2°N 127.2°E / 2.2; 127.2
Diameter64 km
Colongitude234° at sunrise
EponymJames Gregory
Oblique view of Catena Gregory, facing northwest, from Apollo 17
Another oblique view, facing southeast, from Apollo 10

This is a worn and eroded crater formation. The northern rim is degraded due to impacts. Attached to the exterior of the southwest is Gregory Q, a satellite crater about the same size as Gregory. Within the interior is the remains of a small crater rim along the northwestern inner wall. To the east of Gregory and leading away to the southeast is a crater chain designated Catena Gregory.

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 Gregory.

Gregory Latitude Longitude Diameter
K 0.4° S 128.5° E 26 km
Q 0.6° N 125.7° E 68 km


  1. ^ "Gregory (lunar crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
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  • Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.
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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