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Contains:  Dumbbell nebula, M 27, NGC 6853

Image of the day 07/24/2019

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    The Dumbbell Nebula (Messier 27), 


            Luca Marinelli
    The Dumbbell Nebula (Messier 27)
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    The Dumbbell Nebula (Messier 27)

    Technical card

    Dates:July 7, 2019July 8, 2019July 9, 2019July 10, 2019July 11, 2019

    Astrodon Tru-Balance Gen2 E-Series - B 36mm: 40x45" -20C bin 1x1
    Astrodon Tru-Balance Gen2 E-Series - G 36mm: 40x45" -20C bin 1x1
    Astrodon Tru-Balance Gen2 E-Series - R 36mm: 40x45" -20C bin 1x1
    Astrodon Narrowband 3nm Ha: 39x900" -20C bin 1x1
    Astrodon Narrowband 3nm OIII: 31x900" -20C bin 1x1

    Integration: 19.0 hours

    Darks: ~50

    Flats: ~20

    Bias: ~100

    Avg. Moon age: 7.41 days

    Avg. Moon phase: 50.33%

    Bortle Dark-Sky Scale: 5.00

    Basic astrometry details job: 2791873

    RA center: 19h 59' 35"

    DEC center: +22° 42' 50"

    Pixel scale: 0.669 arcsec/pixel

    Orientation: 179.192 degrees

    Field radius: 0.377 degrees

    Resolution: 3180x2524

    Locations: Home Observatory, Schenectady, New York, United States

    Data source: Backyard


    The Dumbbell Nebula (NGC 6853, Messier 27) was the first planetary nebula to be discovered. Charles Messier first identified it in 1764 and due to its brightness (magnitude 7.5) and size (8 arc-min) is a popular visual target. M27 is approximately 1,300 light-years from Earth in the constellation Vulpecula and is estimated to be roughly 10,000 years old.

    Planetary nebulas are the result of the shedding of outer layers from a low-mass red giant as it ends its life. At the center of the gas cloud of the planetary nebula is a white dwarf, the incredibly dense leftover core of the original red giant with no nuclear activity left having burned off all nuclear fuel. The white dwarf in M27 is estimated to have a radius of roughly 0.055 solar radii and a mass of 0.56 solar masses.

    My data presented here was acquired over four nights with unusually good seeing for the Northeastern USA. The integrated Ha and OIII masters had a FWHM of ~2.4 arc-sec, prior to any deconvolution. In spite of the bright RGB signal of this object, I chose to acquire narrowband Ha and OIII channels to highlight the structure in the central region of the planetary nebula and the fainter outer rings. In the central region a few of the larger cometary knots (dark structures with cusped tails) can be resolved.

    To enhance the presentation, I replaced star color with RGB data.



    Luca Marinelli
    License: None (All rights reserved)

    Sky plot

    Sky plot


    The Dumbbell Nebula (Messier 27), 


            Luca Marinelli