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Proper NameNone
Bayer DesignationNone
Flamsteed Number21 Canum Venaticorum
Variable DesignationBK Canum Venaticorum
HR (BSC)5023
ConstellationCanes Venatici
Right Ascension13h 18m 15s
Declination+49° 40' 55"
Distance279 light years
85 parsecs
MagnitudeApparent: +5.2
Absolute: +0.5
Spectral ClassB9IV(Si) blue subgiant (uncertain, some sources prefer A0VSi: white main sequence star)
Optimum VisibilityApril / May (Usually visible from northern latitudes)
Notes21 Canum Venaticorum is a variable star of the Alpha2 Canum Venaticorum type. Stars of this kind show variations in their brightness and their spectrum as they rotate (in this case over a period of some eighteen hours) due to variations on the surface of the star itself.

Imagery provided by Aladin sky atlas


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