68 Cygni

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68 Cygni
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cygnus
Right ascension 21h 18m 27.18561s [1]
Declination +43° 56′ 45.4070″ [1]
Spectral type O8e

68 Cygni is an rotating ellipsoidal variable star in the constellation Cygnus. Its apparent magnitude is 5.04. Located around 1,400 parsecs (4,600 ly) distant, it is a hot blue O-type star of spectral type O8e,[1] a massive star that only lives for a few million years. The star is surrounded by a ring-shaped nebula, and has been hypothesized to be a close binary system.[2]


  1. ^ a b c "V1809 Cygni". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 5 January 2014. 
  2. ^ Alduseva, V. Ia.; Aslanov, A. A.; Kolotilov, E. A.; Cherepashchuk, A. M. "Spectrum variability of 68 Cygni, an O(f) star at the center of a ring nebula". Soviet Astronomy Letters 8: 386–388. Bibcode:1982SvAL....8..386A.