HD 199223
# HD 199223

HD 199223 (HR 8010) is a double star in the equatorial constellation Delphinus. However, the system was originally in Equuleus prior to the creation of official IAU constellation borders. The components have a separation of 2″ at a position angle of 282° as of 2016. They have apparent magnitudes of 6.34 and 7.49 and distances of 354 and 359 light years respectively. The system is drifting closer with a radial velocity of −33 km/s.

The brighter component has a stellar classification of G8 III/IV, indicating that it is a G-type star with the blended luminosity class of a giant star and a subgiant. It has 125% of the mass of the Sun and an enlarged radius of 8.26 $R_☉.$ It shines at 37.1 times the luminosity of the Sun from its photosphere at an effective temperature of 4,956 K, giving it a yellow glow. HD 199223A's iron abundance is 135% that of the Sun and it spins modestly with a projected rotational velocity less than 1 km/s.

As for the dimmer one, it is classified as an F/G star, and is calculated to be an F-type subgiant. It has 146% of the mass of the Sun and 2.1 times its radius. It radiates with a luminosity of 8.82 $L_☉$ from its photosphere at an effective temperature of 6,865 K, giving it a yellow white glow.

