HR 1614
Star in the constellation Eridanus
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HR 1614 (284 G. Eridani, GJ 183) is a star in the constellation Eridanus. Based upon parallax measurements, it is about 28.8 light-years (8.8 parsecs) distant from the Earth.[1] It is a main sequence star with a stellar classification of K3V.[2] The chromosphere has an effective temperature of about 4,945 K,[8] which gives this star the orange hue characteristic of K-type stars.[15] It has about 84% of the Sun's mass and 78% of the Sun's radius.[7]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 05h 00m 48.9993s[1] |
| Declination | −05° 45′ 13.224″[1] |
| Apparent magnitude (V) | 6.208[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | K3 V[2] |
| U−B color index | +1.00[4] |
| B−V color index | +1.06[4] |
| Astrometry | |
| Radial velocity (Rv) | +21.0[5] km/s |
| Proper motion (μ) | RA: 549.309(21) mas/yr[1] Dec.: −1,108.245(16) mas/yr[1] |
| Parallax (π) | 113.0715±0.0222 mas[1] |
| Distance | 28.845 ± 0.006 ly (8.844 ± 0.002 pc) |
| Absolute magnitude (MV) | 6.51[6] |
| Details | |
| Mass | 0.838+0.034 −0.033[7] M☉ |
| Radius | 0.78+0.03 −0.02[7] R☉ |
| Luminosity | 0.302[3] L☉ |
| Surface gravity (log g) | 4.55[2] cgs |
| Temperature | 4,945±8.7[8] K |
| Metallicity [Fe/H] | 0.28[2] dex |
| Rotation | 48.0[9] days |
| Rotational velocity (v sin i) | 4.1[10] km/s |
| Age | 2[11] or 4.5[12] Gyr |
| Other designations | |
| 284 G. Eri, BD−05°1123, GJ 183, HD 32147, HIP 23311, HR 1614, SAO 131688, LHS 200, LPM 200, LTT 2142, PLX 1129[13][14] | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
It is considered a metal-rich dwarf star, which means it displays an unusually high portion of elements heavier than helium in its spectrum. This metallicity is given in term of the ratio of iron to hydrogen, as compared to the Sun. In the case of HR 1614, this ratio is about 90% higher than the Sun.[16] The activity cycle for this star is 11.1 years in length.[17] Based upon gyrochronology, the estimated age of this star is 4.5 Gyr.[12]
This system is a member of a moving group of at least nine stars that share a common motion through space. The members of this group display the same abundance of heavy elements as does HR 1614, which may indicate a common origin for these stars. The space velocity of this group relative to the Sun is 59 km/s.[18] The estimated age of this group is 2 Gyr, suggesting a corresponding age for this star.[11]