New V-band photometry of Cyg OB2 5 (V729 Cyg)
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The Cyg OB2 #5 system is thought to consist of a short-period (6.6d) eclipsing massive binary associated with an OB-star orbiting it with a period of ~6.7yr, themselves orbited...
据推测，天鹅座OB2星协#5系统由一个周期为6.6天的短周期大质量食双星系统，与一颗以约6.7年周期绕该双星运行的O/B型星（OB-star）组成，而该双星与O/B型星组成的整体自身又被……
