Magnitude 3.73 U−B color index +1.78 Absolute magnitude (MV) −4.3/+1.3 Apparent magnitude (V) 3.73 | B−V color index +1.66 Surface gravity (log g) 1.00 cgs | |
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ξ Cygni (latinised as Xi Cygni) is a spectroscopic binary star in the constellation Cygnus. Its apparent magnitude is 3.73 and it is located around 360 parsecs (1,200 ly) away.
The system contains two stars which orbit every 18 years in a mildly eccentric orbit. The primary star is a supergiant of spectral type around K4, while the secondary is a A-type main-sequence star of spectral type A1.5. Stellar winds from the supergiant have been measured at around 50 km/s, but with variations in speed and individual line strengths.
ξ Cygni is in the Kepler field of view but no planets have been detected.
References
Xi Cygni Wikipedia(Text) CC BY-SA