Geological Chronicle
Slipher is a lunar impact crater, that is located in the northern latitudes on the far side of the Moon. The formation spans an official diameter of 74.65 kilometers.
The crater overlies the southwestern outer rim of the much larger walled plain D'Alembert, and it occupies a portion of the interior floor of D'Alembert. It is recorded in the IAU Gazetteer under quadrangle LAC-18.