Geological Chronicle
Located along the eastern edge of Mare Australe on the lunar far side, Lebedev spans 121.8 kilometers in diameter. The crater lies southeast of the larger, flooded Lamb and east-northeast of Anuchin, while the smaller crater Cassegrain lies to the southeast. The formation is named for Russian physicist Pyotr Lebedev.
Lebedev is a worn and eroded crater with an uneven outer rim, though no significant impacts overlay the rim edge. A few small craterlets mark the inner wall, including a pair along the southeast and another to the southwest. A dark, lava-flooded floor forms the crater's most distinctive feature, pitted with tiny craterlets and crossed by a low ridge in the southern half, but otherwise level and nearly featureless.