翻訳と辞書 Words near each other ・ Zeta Crateris ・ Zeta Crucis ・ Zeta Cygni ・ Zeta Delphini ・ Zeta Delta Xi ・ Zeta distribution ・ Zeta Doradus ・ Zeta Draconis ・ Zeta Equulei ・ Zeta Eridani ・ Zeta function (operator) ・ Zeta function regularization ・ Zeta function universality ・ Zeta Geminorum ・ Zeta Gruis ・ Zeta Herculis ・ Zeta Herculis Moving Group ・ Zeta Horologii ・ Zeta Hydrae ・ Zeta Hydri ・ Zeta Indi ・ Zeta Instrument Processor Interface ・ Zeta Interactive ・ Zeta Island, Bermuda ・ Zeta Leonis ・ Zeta Leporis ・ Zeta Lupi ・ Zeta Lyrae ・ Zeta Major ・ Zeta Makripoulia Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Zeta Herculis ： ウィキペディア英語版 Zeta Herculis Zeta Herculis (ζ Her, ζ Herculis) is a multiple star system in the constellation Hercules. It has a combined apparent visual magnitude of 2.81,〔 which is readily visible to the naked eye. Parallax measurements put it at a distance of about from Earth.〔 The primary member is a subgiant star that is somewhat larger than the Sun and has just begun to evolve away from the main sequence as the supply of hydrogen at its core becomes exhausted. It is orbited by a smaller companion star at a mean angular separation of 1.5 arcseconds, which corresponds to a physical separation of about 15 Astronomical Units.〔 This distance is large enough so that the two stars do not have a significant tidal effect on each other. The stars orbit each other over a period of 34.45 years, with a semi-major axis of 1.33" and an eccentricity of 0.46.〔 Component A has a stellar classification of F9 IV.〔 It has about 2.6 times the radius of the Sun and 1.45 times the Sun's mass. This star is radiating more than six times the luminosity of the Sun at an effective temperature of 5,820 K. The secondary component is about the same size and mass as the Sun, with an effective temperature of 5,300 K. Both stars are rotating slowly.〔 There may be a faint third member of this system, although little is known about it.〔 This system forms part of the Zeta Herculis moving group of stars. This group includes: φ2 Pavonis, ζ Reticuli, 1 Hydrae, Gl 456, Gl 678, and Gl 9079.〔 ==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「Zeta Herculis」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.