HD 104067

HD 104067 is a star with a planetary system in the southern constellation of Corvus. It has an apparent visual magnitude of 7.92^[2] which is too faint to be visible with the naked eye. The distance to this star is 66.4 light-years (20.4 parsecs) based on parallax. It is drifting further away with a radial velocity of +15 km/s.^[1]

HD 104067

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Corvus
Right ascension	11h 59m 10.00884s[1]
Declination	−20° 21′ 13.6121″[1]
Apparent magnitude (V)	7.92[2]
Characteristics
Spectral type	K3V[3]
Apparent magnitude (B)	8.894[2]
Apparent magnitude (J)	6.212±0.019[2]
Apparent magnitude (H)	5.754±0.023[2]
Apparent magnitude (K)	5.614±0.024[2]
B−V color index	0.974±0.010[2]
Astrometry
Radial velocity (Rv)	+14.89±0.12[1] km/s
Proper motion (μ)	RA: 141.706 mas/yr[1] Dec.: −423.780 mas/yr[1]
Parallax (π)	49.1470±0.0235 mas[1]
Distance	66.36 ± 0.03 ly (20.347 ± 0.010 pc)
Absolute magnitude (MV)	6.30[2]
Details
Mass	0.818+0.024 −0.025[4] M☉
Radius	0.771+0.007 −0.006[4] R☉
Luminosity	0.307[5] L☉
Surface gravity (log g)	4.56±0.10[6] cgs
Temperature	4,942±14[4] K
Metallicity [Fe/H]	0.11±0.06[6] dex
Rotation	18.3±4.9 d[6]
Rotational velocity (v sin i)	2.47±0.96[4] km/s
Age	4.8+3.3 −3.0[4] Gyr
Other designations
BD−19°3382, GJ 1153, HD 104067, HIP 58451, SAO 180353, PPM 259710, LTT 4461, NLTT 29176[7]
Database references
SIMBAD	data
Exoplanet Archive	data

This is an ordinary K-type main-sequence star with a stellar classification of K3V.^[3] It is a moderately active star^[8] with an age of roughly five billion years. HD 104067 is spinning with a projected rotational velocity of 2.5 km/s,^[4] giving it a rotation period of approximately a month.^[3] The star has 82% of the mass and 77% of the radius of the Sun.^[4] It is radiating 31%^[5] of the Sun's luminosity from its photosphere at an effective temperature of 4,942 K. The metal content of this star is close to that in the Sun.^[4]

Planetary system

HD 104067 has been observed as part of the HARPS planet-finding survey since 2004. The detection of an exoplanetary companion using the radial velocity method was announced in 2011. This sub-Saturn planet, HD 104067 b, has at least 0.2 times the mass of Jupiter and takes 55.8 days to orbit the star at a distance of 0.26 AU.^[8] The discovery of a second, Uranus-mass planet, HD 104067 c, was announced in 2024 based on HARPS and HIRES data. TESS observations also show evidence of a third candidate planet, slightly larger than Earth and orbiting closer to the star than the other two planets, with a period of just 2.2 days. Modeling suggests that this inner planet candidate may experience significant tidal heating.^[6]

The HD 104067 planetary system^[6]

Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
TOI-6713.01 (unconfirmed)	—	0.03054(37)	2.1538197(41)	—	86.5±2.0°	1.30±0.12 R🜨
c	≥13.2±1.9 M🜨	0.1058±0.0013	13.8992+0.0047 −0.0037	0.29+0.12 −0.13	—	—
b	≥62.1+3.3 −3.2 M🜨	0.2674+0.0032 −0.0033	55.851±0.017	0.123+0.048 −0.051	—	—

See also

• List of extrasolar planets