HD 114386
Star in the constellation Centaurus
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HD 114386 is a star with a pair of orbiting exoplanets in the southern constellation of Centaurus. It has an apparent visual magnitude of 8.73,[3] which means it cannot be viewed with the naked eye but can be seen with a telescope or good binoculars. Based on parallax measurements, the system is located at a distance of 91 light-years from the Sun. It is receding with a radial velocity of 33.4 km/s.[4] The star shows a high proper motion, traversing the celestial sphere at an angular rate of 0.318 arcsec yr−1.[8]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 13h 10m 39.824s[2] |
| Declination | −35° 03′ 17.21″[2] |
| Apparent magnitude (V) | 8.73[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | K3 V[3] |
| B−V color index | 0.982[3] |
| Astrometry | |
| Radial velocity (Rv) | 33.350±0.0004[4] km/s |
| Proper motion (μ) | RA: −137.143 mas/yr[2] Dec.: −324.874 mas/yr[2] |
| Parallax (π) | 35.7355±0.0200 mas[2] |
| Distance | 91.27 ± 0.05 ly (27.98 ± 0.02 pc) |
| Absolute magnitude (MV) | 6.43[1] |
| Details | |
| Mass | 0.76±0.01[5] M☉ |
| Radius | 0.73±0.01[5] R☉ |
| Luminosity | 0.28±0.01[5] L☉ |
| Surface gravity (log g) | 4.58±0.02[5] cgs |
| Temperature | 4,926±13[5] K |
| Metallicity [Fe/H] | −0.012[6] dex |
| Rotational velocity (v sin i) | 3.06[6] km/s |
| Age | 8.8±2.8[5] Gyr |
| Other designations | |
| CD−34°8698, HD 114386, HIP 64295, SAO 204193, PPM 291056, LTT 5041, NLTT 33118[7] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
The spectrum of HD 114386 yields a stellar classification of K3 V,[3] matching a K-type main-sequence star, or orange dwarf. It has 76% of the mass of the Sun and 73% of the Sun's radius. HD 114386 is a much older star than the Sun with an estimated age of roughly nine billion years.[5] The abundance of iron in the stellar atmosphere, a measure of the star's metallicity, is nearly solar.[6] It is rather dim compared to the Sun, radiating just 28% of the luminosity of the Sun from its photosphere at an effective temperature of 4,926 K.[5]
Planetary system
In 2004, the Geneva Extrasolar Planet Search Team announced the discovery of an exoplanet orbiting the star by the radial velocity method.[3] The preliminary data for a second, inner, exoplanet was released in 2011;[9] it was confirmed in 2026.[10] The inclination and true mass of the outer planet have been determined by astrometry.[10]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| c | ≥0.37±0.03 MJ | 1.05+0.04 −0.04 |
444.00+0.93 −0.88 |
0.10±0.03 | — | — |
| b | 1.46+0.37 −0.22 MJ |
1.86+0.07 −0.08 |
1049.4+1.5 −1.2 |
0.02±0.01 | 57+22 −15° |
— |