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Omega Leonis : ウィキペディア英語版
Omega Leonis
Omega Leonis is a yellow star of main sequence variable of spectral class G1V〔( Ω Leonis ) at Sinbad Database.〕 located in the constellation of Leo. It is visible to the naked eye in the absence of light pollution, with an apparent magnitude of about 5.4, and is about 112 light years from Earth .〔( Ω Leonis ) at Sinbad Database.〕〔T. J. J. See, Researches on the orbit of ω Leonis = Σ 1356 (Astronomische Nachrichten Vol138, Issue 23, pages 373–378, 1895 ).〕 The primary star is known to have a temperature of 5940k.〔Jim Kaler, (Omega Leo ), (2013).〕
Because of its location close to ' ecliptic, it is often obscured by the Moon, and potentially from planets , usually the inner planets.
The star has a visual binary,〔W. I. Hartkopf and B. D. Mason, Sixth Catalog of Orbits of Visual Binary Stars , (US Naval Observatory Double Star Catalog, 2006).〕 consisting of two stars of magnitude +5.9 and +6.5 separated by 0.5 arc seconds ; the orbital period of around the common center of mass is around 118 years,〔Patrick Moore , The Amateur Astronomer , Cambridge University Press, 1990, p. 221.〕 while the ' \orbital eccentricity is equal to 0.557.〔( EL van Dessel, Orbital elements and removal of the nodal ambiguity for the visual binary ADS 7390 = ω Leo in Astronomy & Astrophysics Supplement Series, vol. 26, 1976, pp. 415-416 ).〕 The masses of the two components, calculated by the method of dynamic parallax, were found to be equal to 1.65 M ☉ and 1.45 M ☉.〔EL van Dessel, Orbital elements and removal of the nodal ambiguity for the visual binary ADS 7390 = ω Leo in Astronomy & Astrophysics Supplement Series, vol. 26, 1976, pp. 415-416.〕
Omega Leonis is best known in popular culture, as the setting for the fictional planet ''Qo'noS'', the homeworld of the fictional Klingons in the Star Trek Telivision franchise.
==References==


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