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NGC 6905 (Planetary nebula)
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Also known as: Blue flash nebula
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Right ascension: 20h 23m
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Declination: 20° 9'
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Constellation: Delphinus
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Date/time: 2012.06.19 1:00 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 + UHC filter(s)
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Seeing: 5/10
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Transparency: 3/5
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Location: Nádasdladány, Hungary
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Observer: Ferenc Lovró
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Description:
Tiny, yet surprisingly bright planetary nebula. Despite its name it doesn't contain any hint of blue colour visually. Its surface is very even, however with deeper examination and higher magnification some details start to show up. To the North for example, you may notice a small bump. The detailed sketch were done at 375x and UHC filter and reveals more surface details. Visible from 71x. With UHC it emerges from its background. The O-III view is not better and not worse than the UHC one. The H-ß filter seem to emphasize faint surface details, however it hides the rest of the nebula and the surrounding stars.
SQM reading: 20.45 MPSAS, 14°C.
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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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