Aldhibah

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Double star
Aldhibah (ζ Draconis)
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Dragon
Right ascension 17 h 08 m 47.2 s
declination + 65 ° 42 ′ 52.9 ″
Apparent brightness 3.17 likes
Typing
B − V color index −0.12 
U − B color index −0.43 
R − I index −0.12 
Spectral class B6 III
Astrometry
Radial velocity (−17.7 ± 0.3) km / s
parallax (9.93 ± 0.35)  mas
distance (328 ± 12)  ly
(101 ± 4)  pc  
Visual absolute brightness M vis −1.85 mag
Proper movement 
Rec. Share: (−20.43 ± 0.42)  mas / a
Dec. portion: (+19.61 ± 0.51)  mas / a
Physical Properties
Other names
and catalog entries
Bayer name ζ Draconis
Flamsteed name 22 Draconis
Bonn survey BD + 65 ° 1170
Bright Star Catalog HR 6396 [1]
Henry Draper Catalog HD 155763 [2]
Hipparcos catalog HIP 83895 [3]
SAO catalog SAO 17365 [4]
Tycho catalog TYC 4210-1048-1 [5]
Other names FK5  639 • IRAS 17086 + 6546 • WDS J17088 + 6543

Aldhibah is the proper name of the star ζ Draconis (Zeta Draconis). Aldhibah has an apparent magnitude of 3.17 mag and belongs to the spectral class B6 III. Aldhibah is around 300 light years from Earth. Other name: "Nodus I".

In 1981 GA Starikova and AA Tokovinin discovered a companion at a positional angle of 32.4 ° and with an angular distance of 0.406. Little is known about the companion.

swell

  1. ↑ a b c Hipparcos catalog (ESA 1997)
  2. ↑ a b c Bright Star Catalog
  3. ↑ Pulkovo radial velocities for 35493 HIP stars
  4. ↑ a b c Hipparcos, the New Reduction (van Leeuwen, 2007)
  5. ↑ estimated based on apparent brightness and distance
  6. ↑ Письма в Астрономический журнал , Vol. 7, Nov. 1981, pp. 692–695, bibcode : 1981SvAL .... 7..384S