翻訳と辞書 Words near each other ・ 5184 Cavaillé-Coll ・ 518th ・ 518th Air Defense Group ・ 51 (film) ・ 51 (number) ・ 51 Aerospace Control and Warning Operational Training Squadron ・ 51 Andromedae ・ 51 Aquarii ・ 51 Aquilae ・ 51 Arietis ・ 51 Aurigae ・ 51 BC ・ 51 Birch Street ・ 51 Degrees North ・ 51 Division (Sri Lanka) ・ 51 Eridani ・ 51 Eridani b ・ 51 Hydrae ・ 51 Market Street ・ 51 Minds Entertainment ・ 51 Nemausa ・ 51 Ophiuchi ・ 51 Orionis ・ 51 Peg ・ 51 Peg (band) ・ 51 Pegasi ・ 51 Pegasi b ・ 51 Special Action Group ・ 51 Squadron ・ 51 Ways to Save Her 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 51 Eridani ： ウィキペディア英語版 51 Eridani 51 Eridani is a star in the constellation Eridanus located at RA 04 h 37 m 36.11 s and declination −02° 28′ 24.2″ with an apparent magnitude of 5.22, meaning it is just visible to the unaided eye in suburban and rural skies. Its absolute magnitude is 2.87. ==General information== Johann Bayer gave the star its Bayer designation of c Eridani, using lower-case letters once he had exhausted all the letters of the Greek alphabet, in his 1603 star chart ''Uranometria''. It was catalogued as 51 Eridani by John Flamsteed in 1725. Located around 97 light-years distant, it shines with a luminosity approximately 5.38 times that of the Sun and has a surface temperature of 7199 K. A cold debris disk has been detected with a likely inner border of 82 astronomical units (AU). A yellow-white main sequence star of spectral type F0V, 51 Eridani is a member of the Beta Pictoris moving group and hence thought to be around 23 million years old.〔 Somewhat more luminous than it should be for its surface temperature, 51 Eridani has also been classified as spectrum F0IV—a type corresponding to ageing stars that have used up their core hydrogen fuel and become subgiants—however in this case it is a phenomenon of very young stars 5 to 30 million years old that have yet to settle on the main sequence. The star is significant as the host sun to one of the first planets to have been directly imaged in wide-orbit, and the first detected by the Gemini Planet Imager. 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「51 Eridani」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.