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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク 13 Boötis ： ウィキペディア英語版 13 Boötis 13 Boötis or ''CF Boötis'' is a variable star in the constellation Boötes. It is approximately 550 light years from Earth.〔 That means if you traveled at the speed of light, it would take 550 years to arrive at 13 Boötis. 13 Boötis is a M-type red giant with a mean apparent magnitude of +5.26. It is classified as an irregular variable star and its brightness varies from magnitude +5.2 to +5.3. 13 Boötis (H VI 112) RA: 14h 08m Dec: +49° 27′ Magnitudes: 5.5, 11.0 Separation: 75.5″ Position Angle: 271° (WDS 2005) Distance: 557 Light Years If you draw a line from Lambda (λ) Boötis to Kappa (κ) Boötis, you’ll find 13 Boötis lying at the midway point and about an arcminute west of it () ==A planetary system?== Back in 1991 Duquennoy & Mayor reported the possible presence of a low-mass object (of likely substellar nature) orbiting the red giant 13 Bootis. They set a minimum mass of 30 times that of Jupiter (likely a brown dwarf) and estimated an orbital period of 1.35 years. So far there has been no confirmation about the presence a substellar object. 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「13 Boötis」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.