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Proper NameNone
Bayer DesignationGamma1,2 Delphini
Flamsteed Number12 Delphini
HR (BSC)7947 (Gamma1), 7948 (Gamma2)
HD197963 (Gamma1), 197964 (Gamma2)
Right Ascension20h 46m 39s (Gamma1), 20h 46m 40s (Gamma2)
Declination+16° 7' 27" (Gamma1), +16° 7' 27" (Gamma2)
Distance116 light years
36 parsecs
MagnitudeApparent: +5.09 (Gamma1), +4.26 (Gamma2)
Absolute: +2.15 (Gamma1), +1.32 (Gamma2)
Spectral ClassF7V bright yellow dwarf (Gamma1)
K1IV orange subgiant (Gamma2)
Planets in this systemGamma2 Delphini b, gas giant (unconfirmed)
Optimum VisibilityAugust

The designation given to a double star that marks the 'nose' of Delphinus the Dolphin. Gamma Delphini consists of two binary systems about 1.5 light years apart, but some 116 light years from Earth.

The two stars of the Gamma Delphini system are barely distinguishable in this image, but zooming in on the star will show that its vertical diffraction spike actually divides into two. The brighter of the two component spikes (to the east or left) represents Gamma2 Delphini, the brighter of the pair, while the fainter spike (to the west or right) relates to Gamma1 Delphini. Imagery provided by Aladin sky atlas


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