Hansen is a lunar impact crater that is located near the eastern limb of the Moon.

[1] It lies to the northeast of the larger crater Condorcet, and to the south of the smaller Alhazen.

The outer wall of Hansen is sharp-edged, with a slight outward bulge to the southwest.

The inner wall drops downward to a shelf of slumped material, then to a slightly bowl-shaped interior.

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