Hansteen est un cratère de 45 km et profond de 1250 m qui se trouve près du bord Sud-ouest d'Oceanus Procellarum (Océan des tempêtes). Au sud-est on trouve le cratère jumeau, inondé de lave sombre, Billy (46 km, 1210 m). La muraille d’Hansteen est quelque peu polygonale sous la forme, particulièrement le long du côté oriental. Le plancher intérieur contient plusieurs arêtes et collines de formes concentriques. Sur le versant Sud-ouest on trouve une rainure Rima Hansteen longue d'environ 25 km et orientée Nord-sud. Au sud-est se situe Mons Hansteed, triangulaire dans la forme et large de 30 km².

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Hansteen is a lunar crater that lies near the southwest edge of the Oceanus Procellarum. To the southeast is the flooded Billy crater. The rim of Hansteen is somewhat polygonal in form, especially along the eastern side. There are a few terraces along the northwestern inner wall. The inner floor contains several ridges, hills, and some grooves, many of which parallel the outer rim. There is a flat patch of lower albedo material in the northeast part of the interior.

Paralleling the southwest outer wall is the brief rille designated Rima Hansteen, a formation with a length of about 25 kilometers. To the southeast of the crater rises the Mons Hansteed mount, or Hansteen Alpha (α). This is roughly triangular in shape and occupies an area about 30 km across on the mare. This feature is younger than Hansteen crater and is thought to be an extrusion of volcanic material.