To the south-west of Das is the irregular crater Mariotte, and Von der Pahlen lies to the east-northeast.

The inner walls have slumped toward the uneven interior floor, leaving a steeper slope near the rim.

The higher albedo ejecta is continuous out to a distance of nearly two crater diameters, then forms wispy rays particularly to the northwest.

Due to its prominent rays, Das is mapped as part of the Copernican System.

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