Lambda Aurigae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 05h 19m 08.475s |
| Declination | +40° 05′ 56.59″ |
| Apparent magnitude (V) | 4.71 |
| Characteristics | |
| Spectral type | G1 V or G1.5 IV-V Fe-1 |
| U−B color index | +0.13 |
| B−V color index | +0.62 |
| R−I color index | 0.32 |
| Astrometry | |
| Radial velocity (Rv) | +66.53±0.14 km/s |
| Proper motion (μ) | RA: +520.569 mas/yr Dec.: −664.488 mas/yr |
| Parallax (π) | 79.6021±0.1005 mas |
| Distance | 40.97 ± 0.05 ly (12.56 ± 0.02 pc) |
| Absolute magnitude (MV) | 4.20 |
| Details | |
| Mass | 1.081+0.054 −0.029 M☉ |
| Radius | 1.331±0.021 R☉ |
| Luminosity | 1.732±0.022 L☉ |
| Surface gravity (log g) | 4.02 cgs |
| Temperature | 5,890±4.3 K |
| Metallicity [Fe/H] | +0.12 dex |
| Rotational velocity (v sin i) | 2 km/s |
| Age | 4, 5.0–7.9 Gyr |
| Other designations | |
| λ Aur, 15 Aurigae, BD+39°1248, FK5 1145, GC 6494, GJ 197, HD 34411, HIP 24813, HR 1729, SAO 40233, PPM 47977, WDS J05191+4006A, LFT 403, LHS 1753, LTT 11625 | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Lambda Aurigae is a Sun-like star in the northern constellation of Auriga. Its name is a Bayer designation that is Latinized from λ Aurigae, and abbreviated Lambda Aur or λ Aur. This star is visible to the naked eye with an apparent visual magnitude of 4.71. Based upon parallax measurements, it is 41 light-years (13 parsecs) distant from the Earth. The star is drifting further away with a high radial velocity of +66.5 km/s, having come to within 24.4 ly (7.5 pc) some 117,300 years ago. It has a high proper motion, traversing the celestial sphere at the rate of 0.844″ per year.