HD 156279

HD 156279 is a star with a pair of orbiting exoplanets located in the northern constellation of Draco. It has various alternate designations, including HIP 84171 and BD+63 1335. Parallax measurements yield a distance of 118 light years from the Sun, but it is drifting closer with a radial velocity of −20 km/s. Despite an absolute magnitude of 5.25, at that distance the star is too faint to be visible to the naked eye with an apparent visual magnitude of 8.17. It is presumed to be a single star, as in 2019 all imaging surveys have failed to find any stellar companions.

The spectrum of HD 156279 has a stellar classification of G6 or K0, depending on the study. Hence it presents as an ordinary main sequence star of the late G-type or early K-type. The star has 93% of the mass of the Sun and 94% of the Sun's radius. HD 156279 is roughly seven billion years old and is spinning with a projected rotational velocity of 2.5 km/s. Based on the abundance of iron, this star is slightly enriched in heavy elements, having 140% of the solar abundance. It is radiating 70% of the luminosity of the Sun from its photosphere at an effective temperature of 5,449 K.

Planetary system
Orbiting HD 156279 are two superjovian planets, the inner HD 156279 b (discovered in 2011) and outer HD 156279 c (discovered in 2016). In 2022, the inclination and true mass of HD 156279 c were measured via astrometry.