Geological Chronicle
Located in the northern hemisphere on the Moon's far side, Chandler is an impact crater spanning 88.6 kilometers in diameter. It lies southeast of the large walled plain D'Alembert and southeast of Chernyshev crater, resting within D'Alembert's outer ejecta blanket. Heavy erosion has reduced the crater to a wide, irregular depression set into the rugged lunar surface.
The rim is heavily worn, with Chandler P, a slightly smaller but equally degraded crater, attached to its outer south-southwest wall. Multiple small impacts mark the rim and inner wall, while a cluster of small impacts has nearly obliterated the northern section. Across the midpoint of the crater floor runs an impact chain, featuring a double impact in the western half and a chain of three impacts in the eastern half.
The rest of the floor is somewhat irregular, marked by multiple tiny craters and a pair of small impacts near the southern rim. Before receiving its official name, the formation was designated Crater 66, while Chandler P was called Crater 64. In 1970, the International Astronomical Union formally named the crater for American astronomer Seth C. Chandler.