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Proper NameNone
Bayer DesignationNu2 Coronae Borealis
Flamsteed Number21 Coronae Borealis
HR (BSC)6108
ConstellationCorona Borealis
Right Ascension16h 22m 29s
Declination+33° 42' 13"
Distance571 light years
175 parsecs
MagnitudeApparent: +5.4
Absolute: -0.9
Spectral ClassK5III orange giant
Optimum VisibilityJune
NotesAn orange giant is a variable star of the eruptive class. It lies in the extreme east of Corona Borealis in the sky, close to the Keystone of Hercules, and forms an optical double with the more distant red star Nu1 Coronae Borealis.

Nu2 Coronae Borealis forms an optical pair with Nu1 Coronae Borealis, just five arcminutes to the north. Though marginally the brighter of the two as seen from Earth, Nu1 Coronae Borealis is actually the more distant of the pair. Both stars are giants, but red Nu1 is rather more luminous than orange Nu2. Imagery provided by Aladin sky atlas


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