Polybius (crater)

Polybius
	Lunar Orbiter 4 image
Coordinates	22.4°S 25.6°E
Diameter	41 km
Depth	2.1 km
Colongitude	335° at sunrise
Eponym	Polybius

Polybius is a lunar impact crater in the southeast part of the Moon, and is named after ancient Greek historian Polybius.[1] It is located to the south-southeast of the larger crater Catharina, in the area framed by the Rupes Altai scarp. Some distance to the northeast is the Mare Nectaris, with the flooded craters Beaumont and Fracastorius.

Location of Polybius

The crater rim of Polybius appears slightly distended in the northeast, and has a cut through the northern wall. But the wall is otherwise moderately intact with only minor erosion. The interior floor is flat and almost featureless, with no central rise. To the south and east, a ray from Tycho cuts across the bowl-shaped Polybius A and Polybius B craterlets.

Satellite craters

Polybius and its 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 Polybius.

Polybius	Latitude	Longitude	Diameter
A	23.0° S	28.0° E	17 km
B	25.5° S	25.5° E	12 km
C	22.0° S	23.6° E	29 km
D	26.9° S	27.9° E	9 km
E	24.4° S	26.2° E	9 km
F	22.2° S	23.0° E	21 km
G	22.5° S	22.7° E	5 km
H	21.1° S	22.7° E	8 km
J	22.7° S	23.5° E	9 km
K	24.3° S	25.3° E	14 km
L	22.0° S	28.2° E	7 km
M	21.3° S	22.1° E	6 km
N	23.4° S	26.8° E	13 km
P	21.5° S	22.9° E	17 km
Q	25.1° S	27.5° E	6 km
R	25.6° S	27.3° E	7 km
T	26.1° S	25.5° E	12 km
V	25.2° S	29.1° E	6 km

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References

"Gazetteer of Planetary Nomenclature | Polybius". usgs.gov. International Astronomical Union. Retrieved August 24, 2017.

Andersson, L. E.; Whitaker, E. A. (1982). NASA Catalogue of Lunar Nomenclature. NASA RP-1097.CS1 maint: ref=harv (link)
Bussey, B.; Spudis, P. (2004). The Clementine Atlas of the Moon. New York: Cambridge University Press. ISBN 978-0-521-81528-4.CS1 maint: ref=harv (link)
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.CS1 maint: ref=harv (link)
McDowell, Jonathan (July 15, 2007). "Lunar Nomenclature". Jonathan's Space Report. Retrieved 2007-10-24.CS1 maint: ref=harv (link)
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.CS1 maint: ref=harv (link)
Moore, Patrick (2001). On the Moon. Sterling Publishing Co. ISBN 978-0-304-35469-6.CS1 maint: ref=harv (link)
Price, Fred W. (1988). The Moon Observer's Handbook. Cambridge University Press. ISBN 978-0-521-33500-3.CS1 maint: ref=harv (link)
Rükl, Antonín (1990). Atlas of the Moon. Kalmbach Books. ISBN 978-0-913135-17-4.CS1 maint: ref=harv (link)
Webb, Rev. T. W. (1962). Celestial Objects for Common Telescopes (6th revised ed.). Dover. ISBN 978-0-486-20917-3.CS1 maint: ref=harv (link)
Whitaker, Ewen A. (1999). Mapping and Naming the Moon. Cambridge University Press. ISBN 978-0-521-62248-6.CS1 maint: ref=harv (link)
Wlasuk, Peter T. (2000). Observing the Moon. Springer. ISBN 978-1-85233-193-1.CS1 maint: ref=harv (link)

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[1] "Gazetteer of Planetary Nomenclature | Polybius". usgs.gov. International Astronomical Union. Retrieved August 24, 2017.