Tags: Crater.
Neper is an old lunar impact crater located near the eastern limb of the Moon. Due to its location the crater must be viewed during a suitable libration and is very foreshortened. The crater lies on the south edge of Mare Marginis to the east of the crater Jansky. To the northwest across the Mare Marginis is the crater Goddard.The crater inner walls have worn terraces with low rim edges at the northern and southern extremes.
