Rho Cygni

Rho Cygni

Observation data Epoch J2000      Equinox J2000
Constellation	Cygnus
Right ascension	21^h 33^m 58.85298^s [1]
Declination	45° 35′ 30.6179″ [1]
Apparent magnitude (V)	4.02 [2]
Characteristics
Spectral type	G8III [3]
U−B color index	+0.56 [2]
B−V color index	+0.89 [2]
Astrometry
Radial velocity (Rv)	+6.88[4] km/s
Proper motion (μ)	RA: -23.79[5] mas/yr Dec.: -93.70[5] mas/yr
Parallax (π)	26.39 ± 0.15[1] mas
Distance	123.6 ± 0.7 ly (37.9 ± 0.2 pc)
Absolute magnitude (MV)	1.13 [6]
Details
Radius	4.40 [7] R☉
Other designations
73 Cygni, FK5 1568, GC 30207, HIP 106481, HR 8252, HD 205435, SAO 51035 [5]
Database references
SIMBAD	data

Rho Cygni (ρ Cyg) is a class G8III^[3] (yellow giant) star in the constellation Cygnus. Its apparent magnitude is 4.02^[2] and it is approximately 123.6 light years away based on parallax.^[1]

References

1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
2. Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237: 0. Bibcode:2002yCat.2237....0D.
3. Jaschek, M. (July 1978), "Catalogue of selected spectral types in the MK system", Bulletin d'Information du Centre de Donnees Stellaires 15 (121), Bibcode:1978BICDS..15..121J Vizier catalog entry
4. Soubiran, C.; et al. (March 2008), "Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants", Astronomy and Astrophysics 480 (1): 91–101, arXiv:0712.1370, Bibcode:2008A&A...480...91S, doi:10.1051/0004-6361:20078788
5. "Rho Cygni". SIMBAD Astronomical Database. Retrieved 2016-04-10.
6. Absolute magnitude calculated as $M = m + 5 (1 + \log_{10}{p})\!\,$, where $M$ is the star's absolute magnitude, $m$ is the star's apparent magnitude, and $p$ is the star's measured parallax in arcseconds.
7. Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition", Astronomy and Astrophysics 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451 Vizier catalog entry