NGC 559 (Open cluster)
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Right ascension: 01h 31m
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Declination: 63° 24'
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Constellation: Cassiopeia
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Date/time: 2017.10.17 20:20 UT
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Equipment: 12" f/5 Newtonian
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FoV: 14'
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Magnification and filter(s): 250x
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Seeing: 6/10
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Transparency: 2/5
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SQM: 20.71 m/as2
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Temperature: 10°C
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Humidity: high
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Wind: none
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Sight: 2 - minor details, somewhat interesting
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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: 2 - easy, bright star nearby
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Location: Talpa Minor Observatory
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Observer: Ferenc Lovró
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Description:
This loose, compact cluster is populated by very faint stars. In the middle a brighter triangle can be seen surrounded by about two dozens of fainter members. At 71x it separates better from its environment that is surprisingly poor in stars, however I need to push the magnification to resolve the faint cluster members. The high humidity makes the sky background very bright, I suspect a much better view if the conditions are great.
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Hi-resolution image: [ reversed sketch | original sketch ]
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