O. Struve 390 (Binary star)
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Right ascension: 19h 55m
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Declination: 30° 12'
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Constellation: Cygnus
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Date/time: 2009.10.03 18:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 10'
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Magnification and filter(s): 250x
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Seeing: 4/10
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Transparency: 2/5
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SQM: 18.33 m/as2
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Temperature: 6°C
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Component A is the brightest part of of the trio by far. They split up easily even at 71x. A: 6.5m, white. B: 9.5m, slightly bluish. C: 11m. A-B: 10", PA: 20°. A-C: 16", PA: 170°.
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Hi-resolution image: [ reversed sketch | original sketch ]
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