The star’s estimated age is 25.2 million years, which means that it won’t be long before it runs out of its supply of hydrogen and evolves into a subgiant and then into an orange giant.īellatrix (Gamma Orionis), image: Wikiskyīellatrix is not quite massive enough to go out as a supernova, so it will probably end up expelling its outer layers to form a planetary nebula, leaving behind a hot white dwarf to illuminate the expanding shell of gas. With an effective surface temperature of 21,700 K, it shines with 9,211 solar luminosities. Both the Simbad and NED databases give the spectral type B2 V, indicating that the star is still a hydrogen-fusing dwarf.īellatrix has a mass 8.6 times that of the Sun and a radius 5.75 times solar. It has the spectrum of a giant, which is why a number of sources cite the spectral type of a giant, B2 III. Star typeīellatrix is a bluish main sequence star with the stellar classification B2 V. Bellatrix lies at a distance of 250 light years from Earth.Īlso known as the Amazon star, it marks the left shoulder of Orion and is one of the seven bright stars that outline the celestial Hunter’s familiar hourglass figure. With an apparent magnitude that varies from 1.59 to 1.64, it is usually just a little fainter than Shaula in the constellation Scorpius and Gacrux in Crux, and it just outshines Elnath in Taurus, Miaplacidus in Carina, and its Orion neighbour Alnilam. Bellatrix, Gamma Orionis (γ Ori), is the third brightest star in Orion constellation, after Rigel and Betelgeuse, and the 26th brightest star in the sky.
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