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NGC 381 (Open cluster)
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Right ascension: 01h 10m
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Declination: 61° 41'
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Constellation: Cassiopeia
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Date/time: 2017.10.17 19:55 UT
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Equipment: 12" f/5 Newtonian
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FoV: 11'
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Magnification and filter(s): 214x
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Seeing: 6/10
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Transparency: 2/5
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SQM: 20.55 m/as2
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Temperature: 12°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: 3 - moderately visible, dark adaptation needed, averted vision might add to 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 sparse open cluster has a population of faint stars, nearly all of them has identical brightness. Contains about 30 stars, although probably there would be more if the sky background was less bright. Barely separates from its stellar neighborhood at small magnification, increasing the power makes it easier to separate. I detect no hint of a diffuse background.
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Hi-resolution image: [ reversed sketch | original sketch ]
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ikonra kattintva magyarul is olvashatod az észlelést.
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