14 Eridani
Star in the constellation Eridanus
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14 Eridani is a star in the equatorial Eridanus constellation. It has an apparent visual magnitude of 6.143[2] and is moving closer to the Sun with a radial velocity of around −5 km/s.[5] The measured annual parallax shift is 29.26 mas,[1] which provides an estimated distance of about 121 light years. Proper motion studies indicate that this is an astrometric binary.[10][11]
 | |
| Observation data Epoch J2000 Equinox | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 03h 16m 35.75439s[1] |
| Declination | −09° 09′ 16.3318″[1] |
| Apparent magnitude (V) | 6.143[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | F5 V Fe−0.7 CH−0.5[4] |
| B−V color index | 0.399[2] |
| Astrometry | |
| Radial velocity (Rv) | −5.3±2.9[5] km/s |
| Proper motion (μ) | RA: +8.057[1] mas/yr Dec.: +22.871[1] mas/yr |
| Parallax (π) | 26.9856±0.2356 mas[1] |
| Distance | 121 ± 1 ly (37.1 ± 0.3 pc) |
| Absolute magnitude (MV) | 3.47[6] |
| Details | |
| Mass | 1.31[7] M☉ |
| Radius | 1.48+0.9 −0.8[1] R☉ |
| Luminosity | 3.87±0.04[1] L☉ |
| Surface gravity (log g) | 4.34±0.14[7] cgs |
| Temperature | 6,719±228[7] K |
| Metallicity [Fe/H] | −0.10[8] dex |
| Age | 1.391[7] Gyr |
| Other designations | |
| 14 Eri, BD−09°627, GC 3918, HD 20395, HIP 15244, HR 988, SAO 130395, PPM 185595, WDS J03158-0849B[9] | |
| Database references | |
| SIMBAD | data |
The visible component has a stellar classification of F5 V Fe−0.7 CH−0.5,[4] which indicates it has the spectrum of an F-type main-sequence star with mild underabundances of iron and methylidyne. It is 1.4[7] billion years old with 1.3[7] times the mass of the Sun and 1.5[1] times the Sun's radius. The star is radiating 3.87[1] times the luminosity of the Sun from its photosphere at an effective temperature of 6,719 K.[7] The system has been detected as a source of X-ray emission.[12]