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PK 80-6.1 (Planetary nebula)
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Also known as: Egg nebula
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Right ascension: 21h 02m
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Declination: 36° 42'
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Constellation: Cygnus
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Date/time: 2017.08.14 21:30 UT
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Equipment: 12" f/5 Newtonian
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FoV: 11'
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Magnification and filter(s): 375x
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Seeing: 7/10
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Transparency: 4/5
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SQM: 21.34 m/as2
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Temperature: 15°C
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Humidity: dry
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Wind: none
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Sight: 3 - definite details, interesting look
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Difficulty: 3 - moderately visible, dark adaptation needed, averted vision might add to details
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Position: 4 - hard, complex starhopping needed
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Location: Talpa Minor Observatory
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Observer: Ferenc Lovró
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Description:
At 71x it looks like a slightly de-focused star which is moderately faint and seem a bit elongated. At 250x the elongation becomes obvious in the N-S direction, and the protoplanetary nebula splits into two lobes. At 375x it looks somewhat large. The Northern part is clearly brighter and has a denser inner region. The Eastern part is smooth and resembles an arrowhead. The whole nebula appears to have a very faint halo around it. Its light is polarized: by using a polarization filter I sense a change in brightness by about 1-2 magnitudes when I rotate the filter to the correct position.
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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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