The system contains two stars which orbit every 18 years in a mildly eccentric orbit. The primary star is asupergiant with aspectral type of around K4, while the secondary is anA-type main-sequence star with a spectral type of A1.5. Stellar winds from the supergiant have been measured at around 50 km/s, but with variations in speed and individual line strengths.[5]
The distance to Xi Cygni is of about 350 parsecs (1,100 ly), based onparallax measurements.[1] At this distance, theapparent magnitude is diminished by 0.16magnitudes.[6]
ξ Cygni is in theKepler spacecraft's field of view but no planets have been detected.[7]
^abcDucati, 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.
^abGinestet, N.; Carquillat, J. M. (2002). "Spectral Classification of the Hot Components of a Large Sample of Stars with Composite Spectra, and Implication for the Absolute Magnitudes of the Cool Supergiant Components".The Astrophysical Journal Supplement Series.143 (2): 513.Bibcode:2002ApJS..143..513G.doi:10.1086/342942.
^abcdReimers, D.; Schroeder, K.-P. (1989). "Observations of modulation and phase displacement of the stellar wind in six red giant spectroscopic binaries".Astronomy and Astrophysics.214: 261.Bibcode:1989A&A...214..261R.
