翻訳と辞書 Words near each other ・ Alpha Girl ・ Alpha Girls ・ Alpha globulin ・ Alpha glucan ・ Alpha GPI ・ Alpha Group ・ Alpha Group (Ukraine) ・ Alpha Gruis ・ Alpha helix ・ Alpha Herculis ・ Alpha High School ・ Alpha Horologii ・ Alpha Hospital Group ・ Alpha House ・ Alpha Hydraulic Diggings ・ Alpha Hydri ・ Alpha hydroxy acid ・ Alpha Ibrahim Bah ・ Alpha Indexes ・ Alpha Indi ・ Alpha Industries ・ Alpha Iota Delta ・ Alpha Island ・ Alpha Island, Bermuda ・ Alpha J-5 Marco ・ Alpha Jamison ・ Alpha Jet (disambiguation) ・ Alpha Kaba ・ Alpha Kanu ・ Alpha Kappa Alpha 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 Hydri ： ウィキペディア英語版 Alpha Hydri Alpha Hydri (α Hyi, α Hydri) is the second brightest star in the southern circumpolar constellation of Hydrus. It is readily visible to the naked eye with an apparent visual magnitude of +2.9. It is sometimes informally known as the Head of Hydrus.〔 This should not be confused with Alpha Hydrae (Alphard) in the constellation Hydra. Alpha Hydri is one of only three stars in the constellation Hydrus that are above the fourth visual magnitude. This star can be readily located as it lies to the south and west of the prominent star Achernar in the constellation Eridanus.〔 Based upon parallax measurements from the Hipparcos mission, Alpha Hydri is located at a distance of about from Earth. This subgiant star is 80%〔 larger and twice as massive as the Sun, with a stellar classification of F0 IV.〔 It is about 810 million years old〔 and is radiating 32 times the Sun's luminosity from its outer atmosphere at an effective temperature of 7,077 K.〔 Alpha Hydri emits X-rays similar to Altair.〔 The space velocity components of this star are (V, W ) = . ==Naming== In Chinese caused by adaptation of the European southern hemisphere constellations into the Chinese system, (), meaning ''Snake's Head'', refers to an asterism consisting of α Hydri and β Reticuli. Consequently, α Hydri itself is known as (, (英語:the First Star of Snake's Head).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 27 日 )〕 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 Hydri」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.