It lies just behind the southern lunar limb, in a region that is sometimes brought into view of the Earth due to libration.

The outer glacis of Ganswindt covers nearly half the interior floor of Idelʹson, reaching to the midpoint.

The remainder of the interior and rim of the crater has been partly overlain by ejecta, producing a rounded, lumpy surface.

Still the surviving outer rim remains distinct, and is not overlain by any other impacts of note.

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