Kappa Delphini is an astrometric binary. The primary star is an early G-typesubgiant star. It has a mass 1.61 times that of the Sun, and is 6.8 times more luminous. The companion star regularly perturbs the G-type primary star primary, causing it to wobble around the barycenter. From this, an orbital period of 45 years has been calculated.[6] The secondary star is a low-mass star, at only 0.4 M☉.[6]
A third star is 12th magnitude ADS 14101 B, 10″ away in 2001, but it is a background object. HD 196794 is an 8th magnitude K2 subgiant214″ away is at the same distance as κ Delphini and shares a common proper motion.[6]
^Eggl, S.; Pilat-Lohinger, E.; Funk, B.; Georgakarakos, N.; Haghighipour, N. (2012). "Circumstellar habitable zones of binary-star systems in the solar neighbourhood". Monthly Notices of the Royal Astronomical Society. 428 (4): 3104. arXiv:1210.5411. Bibcode:2013MNRAS.428.3104E. doi:10.1093/mnras/sts257.
^ abMermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data: 0. Bibcode:1986EgUBV........0M.