Wikipedia
Fedorov (crater)
Federov is a tiny lunar geologic feature ("crater" in IAU nomenclature) located in the western Mare Imbrium. It lies east-northeast of the crater Diophantus, and southeast of Delisle. About 20 kilometers to the south-southeast is the slightly larger formation of Artsimovich.
This feature is slightly elongated and oddly shaped, with a ridge on the northern side. This ridge is about as large around the base as Federov crater, and rises about 0.8 km above the surrounding lunar mare.