| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h30m 02.97400s[1] |
| Declination | +46° 41′ 08.0041″[1] |
| Apparent magnitude (V) | 5.88[2] |
| Characteristics | |
| Evolutionary stage | giant |
| Spectral type | K4 III[3] |
| B−V color index | 1.448±0.008[2] |
| Astrometry | |
| Radial velocity (Rv) | −48.32±0.20[2] km/s |
| Proper motion (μ) | RA: −7.582[1] mas/yr Dec.: +7.854[1] mas/yr |
| Parallax (π) | 4.7747 ± 0.0978 mas[1] |
| Distance | 680 ± 10 ly (209 ± 4 pc) |
| Absolute magnitude (MV) | −0.47[2] |
| Details | |
| Mass | 1.40±0.41[4] M☉ |
| Radius | 35.9+2.5 −2.0[1] R☉ |
| Luminosity | 357.7±8.9[1] L☉ |
| Surface gravity (log g) | 1.57±0.11[4] cgs |
| Temperature | 4,157±92[4] K |
| Metallicity [Fe/H] | −0.218±0.093[5] dex |
| Age | 2.14+0.95 −0.66[4] Gyr |
| Other designations | |
47 Aur, BD+46°1149, FK5 2496, HD 45466, HIP 30972, HR 2338, SAO 41130[6] | |
| Database references | |
| SIMBAD | data |
47 Aurigae ( Lord RICHARD[7]) is a star located around 680 light years away from the Sun in the northern constellationofAuriga. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.88.[2] This object is moving closer to the Earth with a heliocentric radial velocity of −48 km/s, and is expected to come to within 111 ly in around 3.6 million years.[2]
This object is an aging giant star with a stellar classification of K4 III,[3] having exhausted the hydrogen supply at its core then expanded to 36[1] times the Sun's radius. It is roughly two[4] billion years old with 1.4[4] times the mass of the Sun. The star is radiating 358[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,157 K.[4]
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