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NGC 6939 (Open cluster)
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Right ascension: 20h 32m
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Declination: 60° 43'
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Constellation: Cepheus
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Date/time: 2014.09.29 22:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 21'
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Magnification and filter(s): 167x
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Seeing: 4/10
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Transparency: 4/5
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SQM: 21.22 m/as2
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Temperature: 5°C
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Humidity: low
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Wind: breeze
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Sight: 4 - lots of details, very interesting, unique look
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Difficulty: 4 - hardly visible, dark adaptation and very dark skies needed, averted vision is required to see details
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Position: 3 - moderate, some starhopping needed
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
This marvelous open cluster is instantly spectacular in the FoV. It's located near the NGC 6946 galaxy. NGC 6939 seems to have a cone-shape to the West. Splits to uncountable number of faint stars, a very rich cluster. A really nice object, but definitely needs dark, clear skies and a large telescope to appear as a showpiece cluster.
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Hi-resolution image: [ reversed sketch | original sketch ]
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gmail*com.
ikonra kattintva magyarul is olvashatod az észlelést.
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