Geiger (crater) explained

Coordinates:	-14.6°N 158.5°W
Diameter:	34 km
Depth:	Unknown
Colong:	202
Eponym:	Johannes H. W. Geiger

Geiger is a lunar impact crater on the far side of the Moon. It lies to the southwest of the much larger walled plain Keeler, and slightly farther to the northeast of the huge walled plain Gagarin. To the south is the crater Cyrano.

This is a not-quite symmetrical crater formation with small outward bulges along the north and northeast. The rim to the southeast is less well-formed than elsewhere. The northern inner wall is more extensive than elsewhere, slumping across about one-third the inner floor. The interior is otherwise relatively level and is marked by a few tiny craterlets.

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 Geiger.

Geiger	Latitude	Longitude	Diameter
K	16.0° S	159.9° E	11 km
L	16.3° S	159.3° E	6 km
R	15.7° S	156.5° E	40 km
Y	12.7° S	158.1° E	29 km

References

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• Menzel. D. H.. Minnaert. M.. Levin. B.. Dollfus. A.. Bell. B.. Report on Lunar Nomenclature by the Working Group of Commission 17 of the IAU. 10.1007/BF00171763. Space Science Reviews. 12. 2. 136–186. 1971. 1971SSRv...12..136M. 122125855.
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. Patrick Moore . 2001 . On the Moon . . 978-0-304-35469-6 .

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. Antonín Rükl . 1990 . Atlas of the Moon . . 978-0-913135-17-4 .

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. Ewen Whitaker . 1999 . Mapping and Naming the Moon . Cambridge University Press . 978-0-521-62248-6 .

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