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Aldhibah

Nodus I, Zeta Draconis, 22 Draconis

Proper NamesAldhibah, Nodus I, Nodus III
Bayer DesignationZeta Draconis
Flamsteed Number22 Draconis
HR (BSC)6396
HD155763
ConstellationDraco
Right Ascension17h 8m 49s
Declination+65° 41' 51"
Distance340 light years
104 parsecs
MagnitudeApparent: +3.1
Absolute: +1.9
Spectral ClassB6III Blue Giant
Optimum VisibilityJune / July (Usually visible from northern latitudes)
NotesOne of several stars in Draco with the alternative name Nodus, representing knots in the looping shape formed by the Dragon's long serpentine tail. This star is most commonly known as Nodus I but, confusingly, some systems designate Nodus I as Xi Dracronis, with this Zeta star being Nodus III.

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