HD 152079

HD 152079 is a star with an orbiting exoplanet in the southern constellation of Ara. It is located at a distance of 287 light years from the Sun based on parallax measurements,^[2] but is drifting closer with a radial velocity of −21 km/s.^[4] At that distance the star is much too faint to be visible with the naked eye, having an apparent visual magnitude of 9.18.^[1]

HD 152079

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Ara[1]
Right ascension	16h 53m 05.755s[2]
Declination	−46° 19′ 58.64″[2]
Apparent magnitude (V)	9.18[1]
Characteristics
Spectral type	G6V[3]
Apparent magnitude (B)	9.891[1]
Apparent magnitude (J)	7.984±0.021[1]
Apparent magnitude (H)	7.656±0.031[1]
Apparent magnitude (K)	7.634±0.021[1]
B−V color index	0.711±0.025[1]
Astrometry
Radial velocity (Rv)	−21.338±0.0007[4] km/s
Proper motion (μ)	RA: −107.358 mas/yr[2] Dec.: −93.597 mas/yr[2]
Parallax (π)	11.3545±0.0142 mas[2]
Distance	287.2 ± 0.4 ly (88.1 ± 0.1 pc)
Absolute magnitude (MV)	4.62[1]
Details
Mass	1.147±0.030[5] M☉
Radius	1.128±0.074[5] R☉
Luminosity	1.443[6] L☉
Surface gravity (log g)	4.365±0.054[5] cgs
Temperature	5,907±52[5] K
Metallicity [Fe/H]	0.29±0.07[5] dex
Rotational velocity (v sin i)	2.6[6] km/s
Age	6.2 Gyr[6] 1.622±1.369[5] Gyr
Other designations
CD−46°11085, HIP 82632, SAO 227350, PPM 322323[7]
Database references
SIMBAD	data
Exoplanet Archive	data

This is a G-type main-sequence star^[8] with a stellar classification of G6V.^[3] Age estimates range from 1.6^[5] to 6.2^[6] billion years. It has 1.15 times the mass of the Sun and 1.13 times the Sun's girth. This is a metal-rich star, having a higher iron abundance than in the Sun.^[5] The star is radiating 1.44^[6] times the luminosity of the Sun from its photosphere at an effective temperature of 5,907 K.^[5]

Planetary system

It has one confirmed exoplanet, discovered in 2010 by the Magellan Planet Search Program. This is a super-jovian object with an eccentric orbit and a 8.0 yr orbital period.^[8] In 2018, an analysis of HARPS data suggested the presence of an additional outer companion with a mass at least 83% of the mass of Jupiter.^[5]

The HD 152079 planetary system^[5]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥ 2.661±0.046 MJ	4.187+0.051 −0.053	2,918.92+37.87 −39.28	0.532+0.015 −0.016	—	—