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Sadir, Gamma Cygni, 37 Cygni

Proper NamesSadr, Sadir
Bayer DesignationGamma Cygni
Flamsteed Number37 Cygni
HR (BSC)7796
Right Ascension20h 22m 14s
Declination+40° 15' 24"
Distancec.1,800 light years
c.600 parsecs
MagnitudeApparent: +2.2
Absolute: -6.5
Spectral ClassF8Ib Bright Yellow Supergiant
Optimum VisibilityAugust
NotesThis supergiant star has a striking backdrop: it lies in front of a vast glowing cloud of material, the Sadr Region, laced with a maze of dark dust lanes. Sadr itself is intensely luminous, generating some 34,000 times the light energy of the Sun.


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