Scheiner is a lunar impact crater that lies to the west of the enormous Clavius walled-plain. To the southeast near the rim of Clavius is the Blancanus crater. The rim of Scheiner is worn, eroded, and marked with multiple impacts. It is the most heavily worn in the northern part, where a cluster of craterlets covers the entrance to a low valley leading to the north. The floor of the crater has several craterlets, including 'Scheiner A' that lies near the mid-point. The crater is named after an astronomerChristoph Scheiner from 17th century.
Associated craters
By convention these features are identified on Lunar maps by placing the letter on the side of the crater mid-point that is closest to Scheiner crater.
The crater is one of the older formations on the lunar surface and was likely formed during the Nectarian period about 4 billion years ago.
The crater floor retains a diminshed remnant of a central massif, which lies between Clavius C and N. The relative smoothness of the floor and the low size of the central peaks may indicate that the crater surface was formed some time after the original impact.
Notable nearby craters include Scheiner to the west; Blancanus to the southwest; Maginus in the northeast, and Longomontanus to the northwest.
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