Nu Cygni

Nu Cygni

Observation data Epoch J2000      Equinox J2000
Constellation	Cygnus
Right ascension	20^h 57^m 10.41907^s [1]
Declination	41° 10′ 01.6991″ [1]
Apparent magnitude (V)	3.94 [2]
Characteristics
Spectral type	A1Vn [3]
U−B color index	+0.00 [2]
B−V color index	+0.02 [2]
Astrometry
Radial velocity (Rv)	-27.60[4] km/s
Proper motion (μ)	RA: +9.64[5] mas/yr Dec.: -22.75[5] mas/yr
Parallax (π)	8.71 ± 0.34[1] mas
Distance	370 ± 10 ly (115 ± 4 pc)
Absolute magnitude (MV)	-1.36 [6]
Details
Radius	1.90 [7] R☉
Other designations
58 Cygni, FK5 788, GC 29251, HIP 103413, HR 8028, HD 199629, SAO 50274, WDS J20572+4110AB [5]
Database references
SIMBAD	data

Nu Cygni (ν Cyg) is a class A1V^[5] (white main-sequence) star in the constellation Cygnus. Its apparent magnitude is 3.94^[2] and it is approximately 374 light years away based on parallax.^[1] The star consists of a primary (A1V at apparent magnitude 4.07) and one companion at apparent magnitude 6.4 with separation 0.24".^[8]

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. Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
5. "58 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
8. 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 Vizier catalog entry