翻訳と辞書 Words near each other ・ Alpha,alpha-phosphotrehalase ・ Alpha,alpha-trehalase ・ Alpha,alpha-trehalose phosphorylase ・ Alpha,alpha-trehalose phosphorylase (configuration-retaining) ・ Alpha,alpha-trehalose synthase ・ Alpha,alpha-trehalose-phosphate synthase ・ Alpha,alpha-trehalose-phosphate synthase (GDP-forming) ・ Alpha,alpha-trehalose-phosphate synthase (UDP-forming) ・ Alpha,N,O-TMS ・ Alpha,N-DMT ・ Alpha-1 adrenergic receptor ・ Alpha-1 antitrypsin ・ Alpha-1 blocker ・ Alpha-1,3-glucan synthase ・ Alpha Pegasi ・ Alpha Persei ・ Alpha Persei Cluster ・ Alpha Phi ・ Alpha Phi Alpha ・ Alpha Phi Delta ・ Alpha Phi Fraternity House-Beta Alpha Chapter (Champaign, Illinois) ・ Alpha Phi Gamma ・ Alpha Phi Gamma (sorority) ・ Alpha Phi Omega ・ Alpha Phi Omega (Philippines) ・ Alpha Phi Omega national conventions ・ Alpha Phi Sigma ・ Alpha Phi Sorority House (Eugene, Oregon) ・ Alpha Phoenicis ・ Alpha Pi Delta Sorority, Inc 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 Alpha Persei ： ウィキペディア英語版 Alpha Persei Alpha Persei (Alpha Per, α Persei, α Per) is the brightest star in the northern constellation of Perseus, just outshining the constellation's best known star, Algol. Known by the traditional names Mirfak and Algenib, it is a circumpolar star when viewed from the latitude of New York City or higher.〔 It has an apparent visual magnitude of 1.8,〔 placing it among the brightest stars in the sky. Mirfak lies in the midst of a cluster of stars eponymously named the Alpha Persei Cluster, or ''Melotte 20'', which is easily visible in binoculars and includes many of the fainter stars in the constellation.〔 The distance to this star has been determined using the parallax technique, putting it away.〔 == Properties == The spectrum of Alpha Persei matches a stellar classification of F5 Ib,〔 revealing it to be a supergiant star in the latter stages of its evolution. It has a similar spectrum to Procyon, though the latter star is much less luminous. This difference is highlighted in their spectral designation under the Yerkes spectral classification, published in 1943, where stars are ranked on luminosity as well as spectral typing. Procyon is thus F5 IV,〔 a subgiant star. Since 1943, the spectrum of Alpha Persei has served as one of the stable anchor points by which other stars are classified.〔 Mirfak has about 8.5〔 times the Sun's mass and has expanded to roughly 60〔 times the size of the Sun. It is radiating 7,000〔 times as much luminosity as the Sun from its outer atmosphere at an effective temperature of 6,350 K,〔 which creates the yellow-white glow of an F-type star. In the Hertzsprung–Russell Diagram, Mirfak lies inside the region in which Cepheid variables are found.〔 It is thus useful in the study of these stars, which are important standard candles.〔 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「Alpha Persei」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.