Tags: Crater.
Stefan is a lunar crater on the far side of the Moon just beyond the northwestern limb. Attached to the western rim is the slightly smaller crater Wegener and close to the eastern rim is Rynin.As with many craters of this size on the Moon the outer rim has been worn by impact erosion and the edge and inner wall are generally pitted with small craterlets. The southern edge of the rim in particular has been damaged by impacts and is overlain by the satellite crater Stefan L.