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Lat: 22.2°S, Long: 2.5°E, Diam: 46 km, Depth: 2.52 km, Rükl: 55

external image normal_Delaunay%20061229%200005.jpg
Howard Eskildsen


LPOD Photo Gallery Lunar Orbiter Images Apollo Images
- Although not mentioned in the LPI's search list for Delaunay-related Apollo photographs, it (the odd-shaped formation Delaunay) WAS captured on several of Apollo 16's orbital frames! Delaunay is noticeable in A16's Fairchild-mapping/metric magazines REV 26 and REV 48 (oblique south-looking photographs), such as frame AS16-M-0709, in which Delaunay's location is very near the central part of the curved horizon.
- Research: Danny Caes.


(LAC zone 95B4) LAC map Geologic map


Description: Elger

(IAU Directions) DELAUNAY.--Adjoins Faye on the S.W., and is a larger and more complex object, of irregular form, with very lofty peaks on its border. A prominent ridge of great height traverses the formation from N. to S., abutting on the E. border of Lacaille. Delaunay is the last link in the chain commencing with Argelander.

Description: Wikipedia


Additional Information

Depth data from Kurt Fisher database
  • Westfall, 2000: 2.52 km
  • Viscardy, 1985: 1.93 km
  • Cherrington, 1969: 1.92 km

Central peak is 1.5 km tall when measured on the east and 2.3 km tall when measured on the west Sekiguchi, 1972. - fatastronomer


Charles-Eugène Delaunay (April 9, 1816 – August 5, 1872) was a French astronomer and mathematician. He worked on the mechanics of the Moon as a special case of the three-body problem. His infinite series expression for finding the position of the Moon converged too slowly to be of practical use but was a catalyst in the development of functional analysis.

LPOD Articles


Lieutenant-Colonel Delaunay?
- A certain Lieutenant-Colonel Delaunay is mentioned on page 548 of the book Mysterious Universe, a handbook of astronomical anomalies (W.R.Corliss, The Sourcebook Project, 1979), more precisely in the article A New Law of Satellite Distances (J.B.Penniston, Science, 1930). Was this Lieutenant-Colonel Delaunay in some way related to Charles-Eugene Delaunay? - DannyCaes Mar 7, 2015