Lat: 27.3°S, Long: 33.1°W, Length: 78 km, Height: km, Rükl: 52
Straight-edged segment of the 425 km diameter main rim of the Humorum Basin. It presumably is a fault scarp (like the front of the Apennines) marking where the floor of the basin subsided and the rim rose during its impact formation.
Named from nearby promontorium. (Kelvin, Prom.)