h Eridani (HD 23319) is an orange-hued star in the constellation Eridanus. It has an apparent visual magnitude of 4.59,[2] which make it faintly visible to the naked eye in skies with low light pollution. The distance to HD 23319 can be estimated from its annual parallax shift of 18.5 mas,[1] which yields a distance of about 176 light years. It is moving further away from the Earth with a heliocentric radial velocity of +9.9 km/s.[4]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 03h 42m 50.0549s[1] |
| Declination | −37° 18′ 48.661″[1] |
| Apparent magnitude (V) | 4.59[2] |
| Characteristics | |
| Spectral type | K1.5 IIIb CN0.5[3] |
| B−V color index | 1.191±0.002[2] |
| Astrometry | |
| Radial velocity (Rv) | +9.90±0.07[4] km/s |
| Proper motion (μ) | RA: −91.264(70) mas/yr[1] Dec.: −70.315(85) mas/yr[1] |
| Parallax (π) | 18.5379 ± 0.0757 mas[1] |
| Distance | 175.9 ± 0.7 ly (53.9 ± 0.2 pc) |
| Absolute magnitude (MV) | 0.83[2] |
| Details | |
| Mass | 1.42±0.09[5] M☉ |
| Radius | 11.38±0.07[5] R☉ |
| Luminosity | 51.52±0.67[5] L☉ |
| Surface gravity (log g) | 2.56±0.05[5][4] cgs |
| Temperature | 4,592±14[5] K |
| Metallicity [Fe/H] | +0.03±0.06[5][4] dex |
| Rotational velocity (v sin i) | 1.70±0.43[4] km/s |
| Age | 3.17±0.42[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an aging giant star with a stellar classification of K1.5 IIIb CN0.5,[3] where the suffix notation indicates the spectrum shows a mild overabundance of the cyano radical. It is a red clump giant, indicating it is on the horizontal branch and is generating energy through helium fusion at its core.[7] The star has 1.4 times the mass of the Sun and, at the age of 3.2 billion years, has expanded to 11 times the Sun's radius. It is radiating 51 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,592 K.[5]
References
Wikiwand - on
Seamless Wikipedia browsing. On steroids.