HD 142022

HD 142022 is a binary star system located in the southernmost constellation of Octans. It is too faint to be visible to the naked eye, having an apparent visual magnitude of 7.70. The distance to this system is 112 ly based on parallax, but it is drifting closer to the Sun with a radial velocity of −10 km/s.

The primary, designated component A, is an old, Population I G-type star with a stellar classification of G9IV-V, showing a spectrum with mixed traits of a main sequence and a subgiant star. It is an estimated 7.6 billion years old and is spinning with a projected rotational velocity of 2 km/s. The star has similar mass and dimensions as the Sun, but has a 55% higher metallicity. It is radiating 89% of the luminosity of the Sun from its photosphere at an effective temperature of 5516 K.

The magnitude 11.19 companion has the designation LTT 6384 and appears gravitationally bound to the primary. The pair have an angular separation of $0.79$, which corresponds to a projected separation of $−9.96$. The estimated semimajor axis of their orbit is $−337.270$. The secondary is a red dwarf star with a stellar classification of M1V.

The primary star has a single known planetary companion, HD 142022 Ab, discovered in 2005. In 2023, the inclination and true mass of HD 142022 Ab were determined via astrometry.