15 Delphini (15 Del) is a star in the northern constellation of Delphinus. It has an apparent magnitude of 5.99, allowing it to be faintly seen with the naked eye. The star is relatively close at a distance of 99 light years but is receding with a heliocentric radial velocity of .
15 Del has a stellar classification of F5 V, indicating that it is an ordinary F-type main-sequence star. It has 128% the mass of the Sun and a radius of . It radiates at 3 times the luminosity of the Sun from its photosphere at an effective temperature of , giving a yellow-white hue. 15 Del has an iron abundance 74% that of the Sun and at an age of 1.21 billion years — spins leisurely with a projected rotational velocity of .
15 Delphini has 3 companions listed below. Components B and D have different proper motions compared to the host. However, C appears to have a common proper motion, suggesting physical relation, but its parallax indicates a further distance compared to 15 Delphini.
+15 Delphini's companionsCompanionmvPA (°)YearSep. (″)B14.1019201352.1C11.07862020105.5D11.892762020189.6
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