| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 38m 39.53667s[1] |
| Declination | +39° 23′ 27.0659″[1] |
| Apparent magnitude (V) | 5.696[2] |
| Characteristics | |
| Spectral type | K5III[2] |
| U−B color index | +1.56[3] |
| B−V color index | +1.34[3] |
| Astrometry | |
| Radial velocity (Rv) | 31.98±0.15[4] km/s |
| Proper motion (μ) | RA: −22.753[1] mas/yr Dec.: −108.896[1] mas/yr |
| Parallax (π) | 7.0332 ± 0.1300 mas[1] |
| Distance | 464 ± 9 ly (142 ± 3 pc) |
| Absolute magnitude (MV) | 0.76[5] |
| Details | |
| Mass | 1.58±0.53[6] M☉ |
| Radius | 24.5±0.7[1] R☉ |
| Luminosity | 178.0±3.9[1] L☉ |
| Surface gravity (log g) | 1.84±0.11[6] cgs |
| Temperature | 4,277±92[6] K |
| Metallicity [Fe/H] | 0.01±0.05[6] dex |
| Age | 2.2[7] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
51 Aurigae is a single[8] star in the northern constellation of Auriga. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of about 5.70.[2] Based on parallax, it is located some 464 light-years (142 parsecs) away from the Sun.[1] It is receding from the Earth with a heliocentric radial velocity of 32 km/s.[4]
At 2.2 billion years old,[7] 51 Aurigae has evolved off from the main sequence and is now a K-type giant star.[2] It is 1.58 times as massive as the Sun,[6] 24.5 times as wide, and 178 times as luminous.[1] It emits radiation from its photosphere with an effective temperature of about 4,277 K.[6]
GaiaDR2 was invoked but never defined (see the help page).Kharchenko was invoked but never defined (see the help page).EgUBV was invoked but never defined (see the help page).Massarotti was invoked but never defined (see the help page).AllendePrieto was invoked but never defined (see the help page).Feuillet was invoked but never defined (see the help page).Martig was invoked but never defined (see the help page).Eggleton2008 was invoked but never defined (see the help page).