![]() ![]() Thuban’s companion star has 2.6 solar masses or 260% of our Sun’s mass. Based upon its radius, Thuban should be around six times, or more, bigger than our Sun. Thuban has 2.8 solar masses, or 280% of the Sun’s mass, and a radius of 3.4 solar radii, or 340% of the Sun’s radius. The primary component star is both more massive and several times bigger than our Sun. ![]() Thuban is located at around 303 light-years / 93 parsecs away from the Sun. However, it has ceased hydrogen fusion in its core, and it is no longer in the main-sequence. Gravity pulled the swirling dust and gas together and formed the now dethroned pole star.īased upon it metallicity, the interstellar medium from which Thuban formed, was somewhat metal-poor. Thuban formed from an interstellar medium of dust and gas. Designations don’t always denote a star’s position, in terms of brightness. Though it bears the designation Alpha, Thuban is not the brightest star in its constellation. This name was approved by the IAU in 2016. The name is of Arabic origin and it denotes a giant snake. Thuban / Alpha Draconis is named after the Dragon’s tail since this is its position in the constellation of Draco, it bore the name Adib. The eclipses occurring in the Thuban star system lasts for six hours.The two stars are separated from one another by around 0.46 AU.The binary star pair orbit one another within 51.5 days and an eccentricity of 0.43.The secondary star has around 2.6 solar masses, and it is around 40 times more luminous than our Sun. ![]()
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