Thuban - α Draconis (alpha Draconis)
Thuban, also designated as α Draconis (alpha Draconis), is a variable hypergiant star in the constellation of Draco.
Thuban visual magnitude is 3.65. Because of its moderate brightness, Thuban should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.
The table below summarizes the key facts about Thuban:
Celestial coordinates and finder chart of Thuban
Thuban is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Thuban are provided in the following table:
The simplified sky map below shows the position of Thuban in the sky:
Visibility of Thuban from your location
Thuban - α Draconis (alpha Draconis) is circumpolar and transits at 12:10 UTC (altitude: 77.1°)
Digitized Sky Survey image of Thuban
The image below is a photograph of Thuban from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of Thuban is -0.055 arcsec per year in Right Ascension and 0.018 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of Thuban from the Sun and relative movement
Thuban is distant 308.71 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.
Spectral properties of Thuban
Thuban belongs to spectral class A0 and has a luminosity class of III corresponding to a hypergiant star.
The red dot in the diagram below shows where Thuban is situated in the Hertzsprung–Russell diagram.