Segner is a lunar crater located near the southwestern limb , to the northeast of the giant walled plain Bailly. The crater Zucchius is a few kilometers to the south-southwest of the rim, and to the north east lies the unusual formation Schiller. The smaller crater Weigel is located to the east. Segner has a low, worn rim, and is generally much less prominent than the nearby Zucchius. (wikipedia entry)