63 Aurigae
Star in the constellation Auriga
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63 Aurigae is a single[6] star located around 395[1] light years away from the Sun in the northern constellation of Auriga.[5] It is visible to the naked eye as a faint, orange-hued star with an apparent magnitude of 4.91.[2] It is moving closer to the Earth with a heliocentric radial velocity of −28 km/s.[2]
  | |
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Auriga |
| Right ascension | 07h 11m 39.32608s[1] |
| Declination | +39° 19′ 13.9844″[1] |
| Apparent magnitude (V) | 4.91[2] |
| Characteristics | |
| Evolutionary stage | giant |
| Spectral type | K4 III[3] |
| B−V color index | 1.451±0.005[2] |
| Astrometry | |
| Radial velocity (Rv) | −27.89±0.02[2] km/s |
| Proper motion (μ) | RA: +45.655[1] mas/yr Dec.: +2.791[1] mas/yr |
| Parallax (π) | 8.2489±0.1974 mas[1] |
| Distance | 395 ± 9 ly (121 ± 3 pc) |
| Absolute magnitude (MV) | −0.95[2] |
| Details | |
| Radius | 36.88+0.87 −1.51[1] R☉ |
| Luminosity | 335.37±9.25[1] L☉ |
| Surface gravity (log g) | 1.88[4] cgs |
| Temperature | 4067.5+85.8 −47.5[1] K |
| Metallicity [Fe/H] | −0.17±0.06[2] dex |
| Other designations | |
| 63 Aur, BD+39°1882, FK5 274, HD 54716, HIP 34752, HR 2696, SAO 59866[5] | |
| Database references | |
| SIMBAD | data |
This is an evolved giant star with a stellar classification of K4 III.[3] After exhausting the hydrogen at its core, the star has expanded to 37[1] times the radius of the Sun. It is radiating 335[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,068 K.[1]
It was also known to be part of a much bigger constellation named Telescopium Herschelii before it was unrecognized by the International Astronomical Union (IAU).