 It gave a rotation period of 17.7390 hours with a brightness variation of 0.32 magnitude in the R-band ().In February 2014, a refined period of hours with an amplitude of 0.15 magnitude was determined by American astronomer Robert D. Stephens at the Center for Solar System Studies ().According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, "Menelaus" measures 42.72 kilometers in diameter and its surface has an albedo of 0.056.