Geological Chronicle
Millikan is an impact crater situated in the northern hemisphere of the Moon's far side, positioned north of H. G. Wells and southwest of von Békésy. Measuring 93.97 kilometers in diameter, the formation dates to the Nectarian epoch of the lunar geologic timescale.
The crater retains a well-defined, roughly circular rim interrupted by inward slumping that creates small outward bulges along its southern and eastern margins. Unlike the terraced slopes seen in the smaller crater Cantor to the south, the inner walls of Millikan lack a terrace structure.
The interior floor remains relatively level, marked by a number of tiny craterlets and a small, bowl-shaped crater north of the midpoint. A low central peak stands offset to the west of the center of the formation, which was designated Crater 47 prior to formal naming by the International Astronomical Union in 1970.