· · · ·

Rastaban

Asuia, Alwaid, Restaban, Beta Draconis, 23 Draconis

Proper NamesRastaban, Restaban, Asuia, Alwaid
Bayer DesignationBeta Draconis
Flamsteed Number23 Draconis
HR (BSC)6536
HD159181
ConstellationDraco
Right Ascension17h 30m 26s
Declination+52° 18' 5"
Distance380 light years
117 parsecs
MagnitudeApparent: +2.8
Absolute: -2.5
Spectral ClassG2Ib-IIa Yellow Supergiant
Optimum VisibilityJune / July (Usually visible from northern latitudes)
NotesThe primary star of this binary system (Beta Draconis A, formally the star to which the name Rastaban attaches) is a supergiant at a crucial point in its evolution. It is developing toward a phase that will see it redden in colour and swell to a size even greater than its current immense diameter.

Indexes

Related Entries