翻訳と辞書 Words near each other ・ Pi Ursae Majoris ・ Pi Ursae Minoris ・ Pi Virginis ・ Pi Vèriss ・ Pi Zongshi ・ Pi's Lullaby ・ Pi-Chacán ・ Pi-hahiroth ・ PI-RADS ・ Pi-Ramesses ・ Pi1 Columbae ・ Pi1 Cygni ・ Pi1 Gruis ・ Pi1 Orionis ・ Pi1 Pegasi ・ Pi1 Ursae Majoris ・ Pi2 Columbae ・ Pi2 Cygni ・ Pi2 Gruis ・ Pi2 Orionis ・ Pi2 Pegasi ・ PI3 ・ Pi3 Orionis ・ PI3K/AKT/mTOR pathway ・ Pi4 Orionis ・ PI4K2A ・ PI4K2B ・ PI4KA ・ PI4KAP2 ・ PI4KB 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 Pi1 Ursae Majoris ： ウィキペディア英語版 Pi1 Ursae Majoris Pi1 Ursae Majoris (Pi1 UMa, π¹ Ursae Majoris, π¹ UMa) is a yellow G-type main sequence dwarf with a mean apparent magnitude of +5.63. It is approximately 46.8 light years from Earth,〔 and is a relatively young star with an age of about 200 million years.〔 It is classified as a BY Draconis type variable star and its brightness varies by 0.08 magnitudes. In 1986, it became the first solar-type star to have the emission from an X-ray flare observed.〔 Based upon its space velocity components, this star is a member of the Ursa Major moving group of stars that share a common motion through space.〔〔 An excess of infrared radiation has been detected from this system, which suggests the presence of a debris disk. The best fit to the data indicates that there is a ring of fine debris out to a radius of about 0.4 AU, consisting of 0.25 μm grains of amorphous silicates or crystalline forsterite. There may also be a wider ring of larger (10 μm) grains out to a distance of 16 AU.〔 ==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「Pi1 Ursae Majoris」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.