Ξ_Cygni
Xi Cygni
Star in the constellation Cygnus
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 with a spectral type of around K4, while the secondary is an A-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.[6]
ξ Cygni is in the Kepler spacecraft's field of view but no planets have been detected.[8]
- H-alpha RGB amateur image of ξ Cygni, center star, at edge of NGC7000
- NGC 7000 (North America Nebula). ξ Cygni is the bright star on the left.