Beketov is a small lunar impact crater that lies in the northern reaches of the Mare Tranquillitatis.

It is named after Russian chemist Nikolay Beketov.

[1] To the south is the ghost crater Jansen R. Northeast of Beketov, along the edge of the mare, is the crater Vitruvius.

Beketov was previously designated Jansen C before being named by the IAU.

The flooded crater Jansen itself lies to the south.