HIP 14810
Star in the constellation Aries
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HIP 14810 is a star with three exoplanetary companions in the northern constellation of Aries. It positioned about 1.3° to the north of Delta Arietis,[7] but is too faint to be visible to the naked eye with an apparent visual magnitude of 8.6.[3] The system is located at a distance of 165 light-years from the Sun based on parallax measurements,[2] but is drifting closer with a radial velocity of −5 km/s.[3]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aries[1] |
| Right ascension | 03h 11m 14.2302s[2] |
| Declination | +21° 05′ 50.493″[2] |
| Apparent magnitude (V) | 8.585±0.016[3] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | G6V[3] |
| B−V color index | 0.777±0.021[1] |
| Astrometry | |
| Radial velocity (Rv) | −5.121±0.681[3] km/s |
| Proper motion (μ) | RA: −3.784±0.087[2] mas/yr Dec.: −53.154±0.070[2] mas/yr |
| Parallax (π) | 19.7810±0.0449 mas[2] |
| Distance | 164.9 ± 0.4 ly (50.6 ± 0.1 pc) |
| Absolute magnitude (MV) | 4.89[1] |
| Details | |
| Mass | 0.98±0.02[4] M☉ |
| Radius | 1.08±0.03[4] R☉ |
| Luminosity | 0.99±0.01[4] L☉ |
| Surface gravity (log g) | 4.35±0.03[4] cgs |
| Temperature | 5,535±51[4] K |
| Metallicity [Fe/H] | 0.28±0.06[3] dex |
| Rotational velocity (v sin i) | 0.54±0.5[5] km/s |
| Age | 8.7±2.0 Gyr[4] Gyr |
| Other designations | |
| AG+20 283, BD+20°518, HIP 14810, SAO 75776, PPM 92274, TYC 1231-1727-1, GSC 01231-01727[6] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
This is an ordinary G-type main-sequence star with a stellar classification of G6V.[3] It has a relatively low activity level and a low projected rotational velocity of 0.5 km/s, which indicates it is an old star with an age of around eight billion years.[5] The star has a high metallicity with a mass and luminosity about the same as the Sun.[4]
Planetary system
Orbiting the star are three confirmed planets. The discovery paper for HIP 14810 b and HIP 14810 c was published in 2007,[8] while that for HIP 14810 d was published in 2009, together with a revision for the orbital parameters for planet c.[5] Simulations suggest that the orbits of these planets do not allow a stable orbit for a hypothetical super-earth in the habitable zone.[9]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥3.9±0.49 MJ | 0.0696±0.0044 | 6.673892±0.000008 | 0.14399±0.00087 | — | — |
| c | ≥1.31±0.18 MJ | 0.549±0.034 | 147.747±0.029 | 0.1566±0.0099 | — | — |
| d | ≥0.59±0.1 MJ | 1.94±0.13 | 981.8±6.9 | 0.185±0.035 | — | — |