Rhaeticus is a lunar impact crater that lies astride the equator of the Moon, on the southeast edge of the Sinus Medii.

To the north-northwest is the crater Triesnecker, and due south can be found the worn remnant of the walled plain Hipparchus.

[1][2] The outer wall of Rhaeticus is heavily disintegrated, with rifts and notches in the northeast.

Beginning at the crest of the eastern wall is a chain of craterlets that continue to the east-northeast for about a crater diameter.

[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 Rhaeticus.