Geological Chronicle
Perrine is an 87.41-kilometer impact crater located on the northern hemisphere on the far side of the Moon, lying west of the large walled plain Landau and northeast of the crater Charlier. The unusual structure forms part of a chain of connected craters. Widespread degradation and overlapping impacts have worn the perimeter, leaving only a fraction of the original formation intact.
The western two-thirds of Perrine is overlain by the slightly smaller satellite crater Perrine S, giving the surviving formation a crescent shape. Perrine S has a worn outer rim and a small central peak in the middle of its floor, with its own western rim overlain by the still-smaller Perrine T. Only a small portion of the interior floor of Perrine survives, forming a crescent-shaped surface between the outer rampart of Perrine S and the inner wall of Perrine, marked in its northern half by a pair of tiny craterlets.
The surviving rim of Perrine is worn and eroded, with the overlapping pair Perrine E and Perrine G intruding slightly into the eastern rim. A smaller crater has disrupted the southwest end of the outer rim, while a pair of small craters is attached to the northern rim. The crater was formally named by the IAU in 1970 after American astronomer Charles Dillon Perrine; its satellite craters Perrine G and Perrine S were previously designated Crater 94 and Crater 91.