| 翻訳と辞書 |
| Iota Aquilae ： ウィキペディア英語版 |
Iota Aquilae
Iota Aquilae (ι Aql, ι Aquilae) is the Bayer designation for a star in the equatorial constellation of Aquila. It has the traditional name Al Thalimain, which it shares with λ Aquilae. The name is derived from the Arabic term الظليمان ''ath-thalīmain'' meaning "The Two Ostriches". With an apparent visual magnitude of 4.364,〔 this star is bright enough to be seen with the naked eye. Based upon an annual parallax shift of ,〔 it is located at a distance of around from Earth. At that distance, the visual magnitude of the star is diminished by 0.15〔 from extinction caused by intervening gas and dust.
In Chinese, (), meaning ''Right Flag'', refers to an asterism consisting of ι Aquilae, μ Aquilae, σ Aquilae, δ Aquilae, ν Aquilae, 42 Aquilae, HD 184701, κ Aquilae and 56 Aquilae.〔 ''中國星座神話'', written by 陳久金. Published by 台灣書房出版有限公司, 2005, ISBN 978-986-7332-25-7.〕 Consequently, ι Aquilae itself is known as (, (英語:the Fifth Star of Right Flag).)〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 3 日 )〕
Although Iota Aquilae is listed in star catalogues as a giant star, calculations of its dimension show that in reality it is a main-sequence star.〔 It has nearly five times the mass of the Sun and five to six times the Sun's radius.〔 It is emitting 851〔 times the luminosity of the Sun from its outer atmosphere at an effective temperature of 14,552 K,〔 giving it the blue-white hue of a B-type star. The projected rotational velocity of this star is 55 km/s.〔 Even though it is only around 100 million years old, it has already spent 91% of its allotted lifetime on the main sequence.〔
==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「Iota Aquilae」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.
|
|