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HD 168607 (V4029 Sgr) is a blue hypergiant and luminous blue variable (LBV) star located in the constellation of Sagittarius, easy to see with amateur telescopes. It forms a pair with HD 168625, also a blue hypergiant and possible luminous blue variable, that can be seen at the south-east of M17, the Omega Nebula. == Physical Properties == HD 168607 is usually assumed to be at the same distance of the Omega Nebula (2.2 kiloparsecs, 7,200 light years, from the Sun) and may be physically associated with HD 168625.〔 〕 Assuming this distance is correct, this star 〔 〕 is 240,000 times brighter than our Sun with a surface temperature of 9300 K.〔 Its apparent magnitude has a variation of 0.25-0.30 m. with a period of 64 days, but no outburst has been observed.〔 〕 Unlike its neighbour HD 168625, no nebula has been found around this star.〔 〕 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「HD 168607」の詳細全文を読む スポンサード リンク
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