This is a red giant star with a stellar classification of M3 III.[1] The measured angular diameter of this star is 3.67 ± 0.11 mas.[9] At the estimated distance of Delta Ophiuchi,[2] this yields a physical size of about 67 times the radius of the Sun.[10] The radius determined from the observed brightness and colour of the star is 87 R☉.[6]
15 Arietis is a
designation AV Arietis. The period given in the General Catalogue of Variable Stars is 5.032 days.[3] Longterm photometry finds that the strongest pulsation period is 18.1 days with an amplitude of 0.028 magnitudes, while a second is 21.9 days and 0.030 in magnitude.[1]
