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Lat: 22.4°S, Long: 25.6°E, Diam: 41 km, Depth: 2.05 km, Rükl: 57

external image normal_Polybius_LO_iv_084_h1.jpg
LOIV 084 H1


LPOD Photo Gallery Lunar Orbiter Images Apollo Images
- Although there's nothing in the LPI's search list for orbital Apollo photographs of Polybius, this crater WAS captured on several frames made by the southward looking mapping/metric Fairchild camera of Apollo 16, such as frame AS16-M-0693, which shows Polybius very near the central part of the depicted curved horizon, with the high-albedo bowl shaped crater Polybius A "below" (east of) Polybius itself. Note also the bright ray which runs through Polybius A.
- Research: Danny Caes


(LAC zone 96B3) LAC map Geologic map


Description: Elger

(IAU Directions) POLYBIUS.--A ring-plain, about 17 miles in diameter, in the hilly region S.W. of Fracastorius. The border is unbroken, except on the N., where it is interrupted by a group of depressions. There is a long valley on the S.E., at the bottom of which Schmidt shows a crater-chain.

Description: Wikipedia


Additional Information

Depth data from Kurt Fisher database
  • Arthur, 1974: 2.05 km
  • Westfall, 2000: 2.05 km
  • Viscardy, 1985: 2.05 km


  • Polybius (ca. 203–120 BC) was a Greek historian of the Mediterranean world famous for his book called The Histories or The Rise of the Roman Empire, covering in detail the period of 220–146 BC. He is also renowned for his ideas of political balance in the government, which was later used in the drafting of the United States Constitution.
  • Polybius Beta (a pronounced section of Rupes Recta, south of Polybius) (see Chart 85 in the Times Atlas of the Moon).

Larrieu's Dam

- A curious formation at Polybius K, near the Rupes Altai, is unofficially called Larrieu's Dam. It was discovered in 1955 by A.C.Larrieu at Marseilles, France (see Bibliography below).- DannyCaes Aug 3, 2015
- Polybius Beta, a peak in the Rupes Altai, could be a good candidate to be called Gora Belukha (Mount Belukha). On Earth, Gora Belukha is the highest peak in the Altai mountains.- DannyCaes Apr 15, 2008

LPOD Articles


Larrieu's Dam; the 'rediscovery' of a seldom explored topographical lunar feature in the foothills of the Rupes Altai, by Nigel Longshaw.
I did not knew about the appearance of my name (Danny Caes)(sans 's') in that article's last page! (it's because of my experimental Geocities website THE UNKNOWN MOON, which had the very first version of my ABC of Unofficial Lunar Nomenclature in it!). Thanks Nigel Longshaw! - DannyCaes Aug 3, 2015