Slipher is a lunar impact crater, that is located in the northern latitudes on the far side of the Moon.

Because it overlies D'Alembert, Slipher is a younger formation and it has undergone much less erosion.

The interior floor of Slipher is somewhat uneven except in the northeast, and there is a cluster of low central ridges near the midpoint.

A distinct lobate scarp, located near the south wall of the crater, was imaged by Lunar Reconnaissance Orbiter.

[2] By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Slipher.