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Orion's Belt or The Belt of Orion is an asterism within the constellation. It consists of the three bright stars Zeta (Alnitak), Epsilon (Alnilam), and Delta (Mintaka). Alnitak is around 800 light years away from earth and is 100,000 times more luminous than the Sun and shines with magnitude 1.8; much of its radiation is in the ultraviolet ...
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 ...
Rigel is a blue supergiant star in the constellation of Orion. It has the Bayer designation β Orionis , which is Latinized to Beta Orionis and abbreviated Beta Ori or β Ori . Rigel is the brightest and most massive component – and the eponym – of a star system of at least four stars that appear as a single blue-white point of light to the ...
None of the constellations have official symbols. However, occasional symbols for the modern constellations, as well as older ones that occur in modern nomenclature, have appeared in publication. The symbols below were devised by Denis Moskowitz (except those for the 13 constellations already listed above). [99] [109]
Orion's Belt is an asterism in the constellation of Orion.Other names include the Belt of Orion, the Three Kings, and the Three Sisters. [1] The belt consists of three bright and easily identifiable collinear star systems – Alnitak, Alnilam, and Mintaka – nearly equally spaced in a line, spanning an angular size of ~ 140′ (2.3°).
Mintaka is the westernmost of the three stars of Orion's belt. It is easily visible to the naked eye, one of the brightest stars in the sky, and has been known since antiquity. Radial velocity measurements taken by Henri-Alexandre Deslandres in 1900 at Paris Observatory showed that Mintaka had a variable radial velocity and therefore was a ...
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Orion's Sword is a compact asterism in the constellation Orion. It comprises three stars ( 42 Orionis , Theta Orionis , and Iota Orionis ) and M42, the Orion Nebula , which together are thought to resemble a sword or its scabbard .