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Saha
	Lunar Orbiter 2 image
Coordinates	1°36′S102°42′E / 1.6°S 102.7°E
Diameter	99 km
Depth	Unknown
Colongitude	258° at sunrise
Eponym	Meghnad Saha

Saha (crater)

Last updated November 16, 2025

Saha is a lunar impact crater on the Moon's far side, behind the eastern limb as seen from the Earth. It lies less than one crater diameter due east of the similar-sized Wyld, and to the north-northwest of the large walled plain Pasteur.

This crater has been worn and damaged by subsequent impacts, including the satellite crater Saha W which lies across the northwest rim and inner wall. The inner sides still display some terrace-like shelf structures, but these have become worn and have lost definition. There is a small, bowl-shaped crater Saha M in the southwestern part of the interior floor. To the north of this feature is an arcing ridge feature. The floor is otherwise pitted by various tiny craterlets. This crater is a proposed site of Lunar Crater Radio Telescope along with Daedalus crater.^[1]

Satellite craters

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

Saha	Latitude	Longitude	Diameter
B	1.5° N	104.5° E	34 km
C	1.4° N	107.8° E	64 km
D	0.1° N	107.5° E	35 km
E	0.2° S	107.6° E	28 km
J	4.0° S	105.3° E	52 km
M	2.2° S	102.6° E	18 km
N	4.1° S	101.5° E	49 km
W	0.6° S	101.4° E	34 km

Saha E crater from Apollo 11

References

↑ Stenger, Richard (9 January 2002). "Astronomers push for observatory on the moon". CNN. Archived from the original on 25 March 2007. Retrieved 26 January 2007.

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. Archived from the original on 2012-02-08. 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. S2CID 122125855.
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.{{cite book}}: ISBN / Date incompatibility (help)
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.

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[cnn_stenger-1] Stenger, Richard (9 January 2002). "Astronomers push for observatory on the moon". CNN. Archived from the original on 25 March 2007. Retrieved 26 January 2007.

[1]

Lunar Orbiter 2 image
Coordinates	1°36′S102°42′E / 1.6°S 102.7°E / -1.6; 102.7
Diameter	99 km
Depth	Unknown
Colongitude	258° at sunrise
Eponym	Meghnad Saha