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Orion's two brightest stars, Rigel (β) and Betelgeuse (α), are both among the brightest stars in the night sky; both are supergiants and slightly variable. There are a further six stars brighter than magnitude 3.0, including three making the short straight line of the Orion's Belt asterism .
Rigel is generally the seventh-brightest star in the night sky and the brightest star in Orion, though it is occasionally outshone by Betelgeuse, which varies over a larger range. A triple-star system is separated from Rigel by an angle of 9.5 arc seconds. It has an apparent magnitude of 6.7, making it 1/400th as bright as Rigel.
This is the list of notable stars in the constellation Orion, sorted by decreasing brightness. Name B F Var HD HIP RA Dec vis. mag. abs. mag. Dist. Sp. class Notes Rigel:
Uranometria 's page of the constellation Orion. Uranometria is a star atlas produced by Johann Bayer.It was published in Augsburg in 1603 by Christoph Mang (Christophorus Mangus) [1] under the full title Uranometria: omnium asterismorum continens schemata, nova methodo delineata, aereis laminis expressa (from Latin: Uranometria, containing charts of all the constellations, drawn by a new ...
In traditional Chinese astronomy, the name for Betelgeuse is 参宿四 (Shēnxiùsì, the Fourth Star of the constellation of Three Stars) [205] as the Chinese constellation 参宿 originally referred to the three stars in Orion's Belt. This constellation was ultimately expanded to ten stars, but the earlier name stuck. [206]
Detail of Bayer's chart for Orion showing the belt stars and Orion Nebula region, with both Greek and Latin letter labels visible. A Bayer designation is a stellar designation in which a specific star is identified by a Greek or Latin letter followed by the genitive form of its parent constellation's Latin name. The original list of Bayer ...
Of particular note among these stars are "the dog star" Sirius, the brightest star in the sky, and four stars of the easily identified constellation Orion. Equatorial stars of the western hemisphere The equatorial region of the celestial sphere's western hemisphere includes 13 navigational stars from Gienah in the constellation Corvus to Markab ...
Sigma Orionis or Sigma Ori (σ Orionis, σ Ori) is a multiple star system in the constellation Orion, consisting of the brightest members of a young open cluster.It is found at the eastern end of the belt, south west of Alnitak and west of the Horsehead Nebula which it partially illuminates.