Astronomy:63 Cygni
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Cygnus |
| Right ascension | 21h 06m 36.103s[1] |
| Declination | +47° 38′ 54.223″[1] |
| Apparent magnitude (V) | 4.56[2] |
| Characteristics | |
| Spectral type | K4 Ib–IIa[3] |
| B−V color index | 1.569±0.012[2] |
| Astrometry | |
| Radial velocity (Rv) | −26.32±0.23[2] km/s |
| Proper motion (μ) | RA: +5.992[4] mas/yr Dec.: −1.067[4] mas/yr |
| Parallax (π) | 2.66 ± 0.29[4] mas |
| Distance | approx. 1,200 ly (approx. 380 pc) |
| Absolute magnitude (MV) | −2.93[5] |
| Details | |
| Radius | 138[1] R☉ |
| Luminosity | 3,981 - 4,130[1] L☉ |
| Surface gravity (log g) | 1.27[6] cgs |
| Temperature | 3,927[1] K |
| Metallicity [Fe/H] | 0.12[6] dex |
| Rotational velocity (v sin i) | 6.3[7] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
63 Cygni is a single[9] star in the northern constellation of Cygnus, located around 1,030 light years away from Sun. It is visible to the naked eye as an orange-hued star with an apparent visual magnitude of 4.56.[2] 63 Cyg is moving closer to the Earth with a heliocentric radial velocity of −26 km/s.[2]
This is an evolved star showing a stellar spectrum with mixed traits between a bright giant and supergiant. It has been chosen as a spectral standard for the class of K4 Ib–IIa.[3]
For reasons that are not yet clear, 63 Cygni is displaying very long period (982 days) and low-amplitude (742 m/s) variations in radial velocity.[2] The star has expanded to 35[2] times the Sun's radius and is radiating 4,397[5] times the Sun's luminosity from its photosphere at an effective temperature of 4,204 K.[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 Messineo, M.; Brown, A. G. A. (2019). "A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2". The Astronomical Journal 158 (1): 20. doi:10.3847/1538-3881/ab1cbd. Bibcode: 2019AJ....158...20M.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Lee, B. -C. et al. (June 2014), "Low-amplitude and long-period radial velocity variations in giants HD 3574, 63 Cygni, and HD 216946", Astronomy & Astrophysics 566: 6, doi:10.1051/0004-6361/201321863, A124, Bibcode: 2014A&A...566A.124L.
- ↑ 3.0 3.1 Keenan, Philip C.; McNeil, Raymond C. (1989), "The Perkins catalog of revised MK types for the cooler stars", Astrophysical Journal Supplement Series 71: 245, doi:10.1086/191373, Bibcode: 1989ApJS...71..245K.
- ↑ 4.0 4.1 4.2 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 5.0 5.1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 6.0 6.1 6.2 Earle Luck, R. (2014), "Parameters and Abundances in Luminous Stars", The Astronomical Journal 147 (6): 137, doi:10.1088/0004-6256/147/6/137, Bibcode: 2014AJ....147..137L.
- ↑ Lèbre, A. et al. (May 2006), "Lithium abundances and rotational behavior for bright giant stars", Astronomy and Astrophysics 450 (3): 1173–1179, doi:10.1051/0004-6361:20053485, Bibcode: 2006A&A...450.1173L.
- ↑ "63 Cyg". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=63+Cyg.
- ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
 |  |
