Zeta Draconis
From Wikipedia, the free encyclopedia
Zeta Draconis (ζ Dra / ζ Draconis) is a star in the constellation Draco. It also has the traditional names Aldhibah or Nodus I (First Knot, the knot being a loop in the tail of Draco).
It is known as 紫微左垣四 (the Fourth Star of the Left Wall of the Purple Forbidden Enclosure), or simply 上弼 (the Star of the First Minister) in Chinese.
Aldhibah has an apparent magnitude of +3.17 and belongs to the spectral class B9III. Aldhibah is 300 light years from the Earth.
- Coordinates (equinox 2000.0)
- Right ascension: 17h08m47.20s
- Declination: +65°42'53.0"
