Cassini is a lunar impact crater that is located in the Palus Nebularum, at the eastern end of Mare Imbrium.
[1] To the northeast is the Promontorium Agassiz, the southern tip of the Montes Alpes mountain range.
The surface is peppered with a multitude of impacts, including a pair of significant craters contained entirely within the rim.
The walls of this crater are narrow and irregular in form but remain intact despite the lava flooding.
By convention these features are identified on lunar maps by placing the letter on the side of the crater midpoint that is closest to Cassini.