63 Aurigae
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]
 63 Aurigae in optical light | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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[1] mas |
| 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 | |
| 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]
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
- Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins Catalog of Revised MK Types for the Cooler Stars", The Astrophysical Journal Supplement Series, 71: 245, Bibcode:1989ApJS...71..245K, doi:10.1086/191373.
- McWilliam, Andrew (December 1990), "High-resolution spectroscopic survey of 671 GK giants. I - Stellar atmosphere parameters and abundances", Astrophysical Journal Supplement Series, 74: 1075–1128, Bibcode:1990ApJS...74.1075M, doi:10.1086/191527.
- "63 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-24.
- Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.
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