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Delta Draconis

Delta Draconis, formally named Altais, is a yellow star in the constellation of Draco. It has an apparent visual magnitude of 3.0, making it easily visible to the naked eye. Based on parallax measurements obtained by the Gaia mission, it is approximately 97.8 light-years from the Sun.

Nomenclature
δ Draconis (Latinised to Delta Draconis) is the star's Bayer designation. It bore the traditional names Aldib, Altais to catalogue and standardize proper names for stars. The WGSN approved the name Altais for this star on 21 August 2016 and it is now so included in the List of IAU-approved Star Names. Consequently, the Chinese name for Delta Draconis itself is (, ). ==Properties==
Properties
Delta Draconis is a giant star with a stellar classification of G9 III. This indicates that it has exhausted the supply of hydrogen at its core and entered a later stage in its evolution. Around 1.7 billion years old, Delta Draconis has expanded to 10.5 times the Sun's radius and is radiating 59 times the luminosity of the Sun from its outer atmosphere at an effective temperature of 4,873 K. ==References==
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