New V-band photometry of Cyg OB2 5 (V729 Cyg)
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https://b2find.eudat.eu/dataset/a0172d02-4afd-52e2-8844-743b4d88333f
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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...
