4 Cygni

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
4 Cygni[1]
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Cygnus
Right ascension 19h 26m 09.12723s
Declination +36° 19' 04.43"
Spectral type B9sp I
U−B color index -0.43
B−V color index -0.12
Variable type α2 CVn[2]
Radial velocity (Rv)-22 km/s
Proper motion (μ) RA: 4.60 mas/yr
Dec.: 13.58 mas/yr
Parallax (π)4.61 ± 0.62 mas
Distanceapprox. 710 ly
(approx. 220 pc)
Other designations
4 Cygni, V1741 Cygni, HR 7395, BD+36°3557, HD 183056, SAO 68301, HIP 95556, GC 26846, GSC
Database references

4 Cygni (4 Cyg) is a star in the constellation Cygnus, approximately 710 light years away from Earth.[1]


  1. ^ a b "* 4 Cyg". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved March 4, 2014. 
  2. ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.