Almanon (crater)

Almanon

LRO WAC mosaic
Coordinates	16.8°S 15.2°E / -16.8; 15.2
Diameter	49 km
Depth	2.5 km
Colongitude	345° at sunrise
Eponym	Abdalla Al Mamun

Lunar Orbiter 4 image

Selenochromatic Image (Si) of the crater area

Oblique view of Almanon, the satellite crater Almanon C and its surroundings including Geber and Azophi, Apollo 16 image

Almanon is a lunar impact crater that lies in the rugged highlands in the south-central region of the Moon. It was named after Abbasid Caliph and astronomer Al-Ma'mun.[1] It is located to the south-southeast of Abulfeda, and to the north-northeast of the smaller crater Geber. The crater chain designated Catena Abulfeda forms a line between the south rim of Abulfeda and the north rim of Almanon, continuing for a length of about 210 kilometers to the Rupes Altai scarp.

The rim of Almanon forms a slightly distorted circle, with outward bulges to the north and southwest. The crater pair Almanon A and Almanon B is attached to the exterior of the southern rim. The interior wall is wider along the eastern side than elsewhere. Small craters belonging to the Catena Abulfeda intrude slightly into the northeast rim. The outer wall is generally worn and lacks the crispness of a younger crater, but is not significantly impacted by subsequent cratering. The interior floor is relatively flat and lacks notable features other than 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 Almanon.

Almanon	Latitude	Longitude	Diameter
A	17.7° S	15.3° E	10 km
B	18.3° S	15.3° E	25 km
C	16.1° S	16.0° E	16 km
D	18.6° S	15.6° E	6 km
E	17.9° S	13.7° E	5 km
F	15.9° S	14.3° E	5 km
G	17.8° S	14.6° E	5 km
H	19.0° S	15.3° E	6 km
K	15.8° S	15.4° E	8 km
L	18.9° S	16.6° E	6 km
P	18.5° S	17.0° E	8 km
Q	18.1° S	17.0° E	5 km
R	18.2° S	15.9° E	4 km

References

1. "Almanon (crater)". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.

• Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.
• 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.
• 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.
• 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 links

• Media related to Almanon (crater) at Wikimedia Commons
• Almanon at The Moon Wiki