翻訳と辞書 Words near each other ・ R Canum Venaticorum ・ R Carinae ・ R Cassiopeiae ・ R Centauri ・ R City Mall ・ R class ・ R Commander ・ R Coronae Australis ・ R Coronae Borealis ・ R Coronae Borealis variable ・ R Corvi ・ R Crucis ・ R Cygni ・ R D Memorial High School, Naigaon ・ R D Rajpal public school ・ R Doradus ・ R Equulei ・ R Family Vacations ・ R Flourney, California ・ R Force ・ R Gandhi ・ R Geminorum ・ R gene ・ R Gopalakrishnan ・ R group ・ R Horologii ・ R Hydrae ・ R interface ・ R Is for Rocket ・ R J Balson & Son 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 R Doradus ： ウィキペディア英語版 R Doradus R Doradus〔 (HD 29712〔 or P Doradus) is the name of a red giant Mira variable star in the far-southern constellation Dorado, although visually it appears more closely associated with the constellation Reticulum. Its distance from Earth is .〔 Having a uniform disk diameter of arcsec,〔 it is currently believed to be the star with the second largest apparent size as viewed from Earth (right after the Sun). The estimated diameter of R Doradus is 515 ± 70 million km (3.46 AU) or 〔 times the diameter of the Sun. If placed at the centre of the Solar System, the orbit of Mars and most of the main asteroid belt would be contained within the star. The visible magnitude of R Doradus varies between 4.8 and 6.6, which makes it usually just visible to the naked eye, but in the infrared it is one of the brightest stars in the sky and its total luminosity is 6500 ± 1400 times that of the Sun. With a near-infrared J band magnitude of −2.6,〔 only Betelgeuse at −2.9 is brighter. ==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「R Doradus」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.