Curtius is a lunar impact crater that is located in the southern part of the Moon.

[2] The outer rim of Curtius has been softened due to impact erosion, but it retains much of its original structure.

Along the north and northwest parts of the rim are a pair of notable outward bulges that ruin the overall symmetry of the crater.

The northern part of the inner wall has extended further into the crater floor than elsewhere, producing a slightly irregular surface.

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