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・ Theta group
・ Theta Gruis
・ Theta Herculis
・ Theta Hydrae
・ Theta Indi
・ Theta Island, Bermuda
・ Theta Islands
・ Theta Kappa Nu
・ Theta Kappa Omega
・ Theta Kappa Pi
・ Theta Kappa Psi
・ Theta Leonis
・ Theta Leporis
・ Theta Librae
・ Theta Lupi
Theta Lyrae
・ Theta lyronuclea
・ Theta meson
・ Theta model
・ Theta Muscae
・ Theta Museum
・ Theta Networks
・ Theta Normae
・ Theta Nu Epsilon
・ Theta Nu Xi
・ Theta Octantis
・ Theta operator
・ Theta Ophiuchi
・ Theta Orionis
・ Theta Pavonis


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Theta Lyrae : ウィキペディア英語版
Theta Lyrae


Theta Lyrae (θ Lyr) is a star in a trinary star system, in the constellation Lyra, approximately 770 light years away from Earth. Theta Lyrae is an orange bright giant star of the spectral type K0II, meaning it possesses a surface temperature of about 5,000 kelvins, and is many times bigger and brighter, yet cooler, than our Sun.〔
It is orbited by a subsystem composed of BD+37° 3399 and BD+37° 3399B. 10th magnitude BD+37° 3399 is a giant star with a spectral type of K2III. It is therefore almost the same temperature as Theta Lyrae, but smaller and dimmer.〔 BD+37° 3399B is an 11th magnitude star of an unknown spectral type.〔
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Theta Lyrae」の詳細全文を読む



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