Tags: Crater.
Harpalus is a young lunar impact crater that lies on the Mare Frigoris at the eastern edge of the Sinus Roris. To the southeast at the edge of the mare is the small crater Foucault and to the northwest on the opposite edge is the walled plain named South.The rim of Harpalus is sharp-edged with little sign of wear or erosion. It is surrounded by an outer rampart of ejecta most notably towards the north and is at the center of a small ray system.