DELTA CYG (Delta Cygni). Cygnus, the Swan, flies south along the Milky Way, its tail marked by Deneb (Alpha Cygni), its head by Albireo (Beta), and its outstretched wings by Gienah (Epsilon, to the west) and Delta (to the east), ...
Delta Cygni is a visual binary with an orbit of 828 years. Presently the values are: 2.9, 6.3; 224º, 2.5".
[3070] delta Cygni, also known as Rukh in Persian or Urakhga in Akkadian is a magnitude 3 star named after the roc, a huge mythical bird of prey said to have been able to carry and eat elephants.
The double delta Cyg consists of B9.5 sub giant and a F1 main sequence star. The two stars have a orbital period of 300 years. The brightness of the two stars differ from each other about 5 mag.
The transverse runs from Gienah (ε Cyg) in one wing to Delta Cygni (δ Cyg) in the other.
*The Great Hook is the traditional Polynesian name for Scorpius.
Al Fawaris Delta Cygni
Alfecca Meridiana Alpha Coronae Australis
Alfirk Beta Cephei
Algedi Alpha Capricorni
Al Giedi Alpha Capricorni
Algenib Alpha Persei
Algieba Gamma Leonis
Algol Beta Persei
Algorab Delta Corvi
Alhajoth Alpha Aurigae ...
Traveling one quarter of a degree north of NGC 6866, and 3 1/2 degrees further above the horizon brings us to the bright (magnitude 3) star Delta Cygnus.
The eastern-most (left) wingtip of Cygnus the Swan. (Delta Cygnus, the western-most (right) wingtip, doesn't make this list.)
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Zeta Centauri ...
 See also: Delta, Cygnus, Constellation, Epsilon, Distance
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