(formerly Poincaré R)|| Lat: 60.8°S, Long: 153.3°E, Diam: 50 km, Depth: km, Rükl: (farside)
Cailleux lies within the South Pole Aitken Basin (Diam., 2500 km) and just off the outer, south-western ring of the Poincare Basin (Diam., 319 km) -- both created during the pre-Nectarian period (~ 4.6 to 3.92 bn years). Cailleux is quite circular with a relatively worn rim all around -- impacted by several small impacts that, too, look worn. Needless to mention that the Schrodinger Basin (Imbrium period) -- lying some 300 kilometres away to its south-west -- may be responsible for the old-looking appearance of the crater where ejecta deposits have landed in and around the crater. The interior of Cailleux shows a flat floor, but smaller impact craters within the region look fresher than those that lie around it -- perhaps, due to secondary events from the above-mentioned, younger basin.- JohnMoore2
- Andre Cailleux (December 24, 1907 - December 27, 1986) was a French paleontologist and geologist. After earning his Ph.D. in 1942, he became a specialist in glacial and periglacial morphology. He worked as a professor of geology at the Sorbonne in Paris.
- This name was added to the IAU nomenclature in 1997 (IAU Transactions XXIIIB).
- The name Cailleux should not be confused with Cayeux of Dorsum Cayeux, which is a wrinkle ridge at the moon's Near Side!- DannyCaes Apr 26, 2009