R Cygni

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R Cygni
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cygnus
Right ascension 19h 36m 49.381s [1]
Declination +50° 11′ 59.46″ [1]
Spectral type S2.5,9e-S6,9e(Tc)[2]

R Cygni is a variable star of the Mira type in the constellation Cygnus. It has a maximum magnitude of 6.1 and a minimum magnitude 14.4; its period of 426 days. It is a red giant ranging between spectral types S2.5,9e-S6,9e(Tc).[2]


  1. ^ a b "V* R Cygni -- S Star". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 21 January 2014. 
  2. ^ a b BSJ (4 January 2010). "R Cygni". AAVSO Website. American Association of Variable Star Observers. Retrieved 21 January 2014.