Geological Chronicle
Cailleux is a lunar impact crater that is attached to the southwest rim of the walled plain called Poincaré. The formation spans an official diameter of 52.85 kilometers.
The Cailleux crater lies within the South Pole-Aitken basin in the southern part of the Moon's far side, and cannot be seen from the Earth. It is recorded in the IAU Gazetteer under quadrangle LAC-131.