Mersenius (crater)

84.46

Mersenius is an impact crater on the western edge of the lunar front side, west of the Mare Humorum. The heavily eroded crater wall has terraces, the interior of the crater is flat and crossed by fractures that belong to the system of grooves of Rimae Mersenius whose western main groove starts east of Mersenius and northeast runs direction to the west of Gassendi, near Gassendi G to end. The eastern, running parallel to the main groove denotes the edge of the plain of the Mare Humorum, continues the Rupes Liebig and ends on the wall of Gassendi.

The crater was officially named by the IAU in 1935 after the French mathematician Marin Mersenne.