HD 141399
Star in the constellation Boötes
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HD 141399 is a K-type subgiant star 121 light-years away in the constellation of Boötes. Its surface temperature is 5602 K. HD 141399 is enriched in heavy elements compared to the Sun, with a metallicity Fe/H index of 0.36±0.03.[8] The star has very low starspot activity.[6]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes[2] |
| Right ascension | 15h 46m 53.8132s[3] |
| Declination | +46° 59′ 10.543″[3] |
| Apparent magnitude (V) | 7.20[4] |
| Characteristics | |
| Evolutionary stage | subgiant[3] |
| Spectral type | K0[5] |
| B−V color index | 0.73±0.04[6] |
| Astrometry | |
| Radial velocity (Rv) | −21.9±0.2[3] km/s |
| Proper motion (μ) | RA: −108.119[3] mas/yr Dec.: +6.040[3] mas/yr |
| Parallax (π) | 26.9888±0.0146 mas[3] |
| Distance | 120.85 ± 0.07 ly (37.05 ± 0.02 pc) |
| Absolute magnitude (MV) | +4.4[7] |
| Details | |
| Mass | 1.09±0.08[8] M☉ |
| Radius | 1.46±0.15[9] R☉ |
| Luminosity | 1.59±0.39[9] L☉ |
| Habitable zone inner limit | 0.974–1.233 AU [1] |
| Habitable zone outer limit | 2.190–2.309 AU [1] |
| Surface gravity (log g) | 4.24±0.05[8] cgs |
| Temperature | 5,602±34[8] K |
| Metallicity [Fe/H] | 0.36±0.03[8] dex |
| Rotation | 49±12[6] |
| Rotational velocity (v sin i) | 2.9±1.0[6] km/s |
| Age | 7.23[10] Gyr |
| Other designations | |
| BD+47 2267, HIP 77301, TYC 3490-928-1, GSC 03490-00928, 2MASS J15465382+4659105[11] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Planetary system
In 2014, four planets orbiting HD 141399 were discovered by the radial velocity method.[9] Planet HD 141399c is possibly located within the habitable zone.[6] The planetary orbits are close to high-order mean-motion resonance[12] and closely conform to the Titius–Bode law. Two additional planets, one with a period of 462.9 days, are suspected by analogy with the orbits of the Solar System planets.[13] The planetary orbits around HD 141399 are expected to "jump" periodically on a timescale of a few million years between several quasi-stable configurations due to planet-planet interactions.[12] HD 141399 is one of only two known planetary systems consisting of at least four massive gas giants (the other is the system of planets around the young star HR 8799).[14]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.451±0.030 MJ | 0.415±0.011 | 94.44±0.05 | 0.04±0.02 | — | — |
| c | 1.33±0.08 MJ | 0.689±0.02 | 201.99±0.08 | 0.048±0.009 | — | — |
| d | 1.18±0.08 MJ | 2.09±0.06 | 1069.8±6.7 | 0.074±0.025 | — | — |
| e | 0.66±0.10 MJ | 5.0±1.5 | 3370±90 | <0.1 | — | — |