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Image of the day 03/04/2020

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    Abell 61 (PK 077.6+14.7), 



    
        

            Boris US5WU
    Abell 61 (PK 077.6+14.7)
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    Abell 61 (PK 077.6+14.7)

    Technical card


    Dates:Sept. 1, 2019Sept. 2, 2019Sept. 3, 2019Sept. 4, 2019Sept. 9, 2019Sept. 17, 2019

    Frames:
    B: 16x600"
    G: 16x600" bin 1x1
    Astrodon Ha 1.25 5nm: 38x900" bin 2x2
    L: 92x300" bin 1x1
    Astrodon O3 1.25 3nm: 44x900" bin 2x2
    R: 16x600" bin 1x1

    Integration: 36.2 hours

    Avg. Moon age: 7.44 days

    Avg. Moon phase: 41.13%


    Basic astrometry details

    Astrometry.net job: 3259546

    RA center: 19h 19' 10"

    DEC center: +46° 14' 52"

    Pixel scale: 0.675 arcsec/pixel

    Orientation: 3.743 degrees

    Field radius: 0.250 degrees


    Resolution: 2034x1723

    Locations: Home observatory, Chervonograd, Lvov region, Ukraine

    Data source: Backyard

    Description

    Abell 61 (PK 077.6+14.7) is pretty faint and pretty ancient planetary nebula in Cygnus. It is located somewhere aroud 4,500 light years away and its age is estimated to 22,000 years. Central star apparent brightness is 17mag and its surface temperature is over 60,000 K. Apparent diameter of Abell 61 is about 3.3 arc minutes, so it is similar size as famous M97 Owl nebula. But Abell 61 is about 100 times fainter.

    This image taken over several nights in September 2019.

    Comments

    Author

    Boris_US5WU
    Boris US5WU
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    Abell 61 (PK 077.6+14.7), 



    
        

            Boris US5WU