翻訳と辞書 |
W Sagittarii : ウィキペディア英語版 | W Sagittarii
W Sagittarii (W Sgr) is a cepheid variable star in the constellation Sagittarius. It was temporarily referred to as Gamma-1 Sagittarii (γ¹ Sgr). It is an optical line-of-sight companion to the much brighter (Nasl ) Gamma-2 which marks the "nozzle" ("spout") of the "teapot" asterism forming a large part of Sagittarius.〔(Kaler's Stars website - Al Nasl page )〕 == Variability == This variable star changes in apparent magnitude from 4.29m to 5.14m with a period of 7.6 days. Its change in brightness is accompanied by a change in spectral classification, from G2Ib to F4Ib. Based on its variability, W Sagittarii has been estimated to be approximately 1,500 light years from Earth.〔
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「W Sagittarii」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.
|
|