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Image of the day 12/29/2019

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    Sh2-71 - A Complex Planetary, 


            Jason Guenzel
    Sh2-71 - A Complex Planetary

    Sh2-71 - A Complex Planetary

    Technical card

    Resolution: 1080x1080

    Dates:July 12, 2019July 23, 2019July 24, 2019July 27, 2019July 31, 2019Aug. 1, 2019Aug. 2, 2019Aug. 3, 2019Aug. 13, 2019Aug. 19, 2019Aug. 20, 2019Aug. 22, 2019Aug. 23, 2019Aug. 24, 2019Aug. 25, 2019

    Astronomik Deep-Sky B 1.25": 25x120" (gain: 76.00) -20C bin 1x1
    Astronomik Deep-Sky G 1.25": 20x120" (gain: 76.00) -20C bin 1x1
    Astronomik Deep-Sky R 1.25": 20x120" (gain: 76.00) -20C bin 1x1
    Astronomik H-alpha 6nm CCD 1.25": 189x240" (gain: 139.00) -20C bin 1x1
    Astronomik OIII 6nm CCD 1.25": 181x240" (gain: 139.00) -20C bin 1x1

    Integration: 26.8 hours

    Darks: ~50

    Flats: ~50

    Bias: ~256

    Avg. Moon age: 16.77 days

    Avg. Moon phase: 45.68%

    Bortle Dark-Sky Scale: 5.00 job: 3132470

    RA center: 19h 2' 0"

    DEC center: +2° 9' 14"

    Pixel scale: 0.506 arcsec/pixel

    Orientation: 270.702 degrees

    Field radius: 0.107

    Data source: Backyard


    As a sun-like star begins to deplete it’s hydrogen fuel, a sequence of interesting change is initiated. The core, unable to support its own crushing gravity, compresses and increases dramatically in temperature. In an opposite fashion, the outer atmosphere swells and cools under the intense pressure from within. A red giant is born.

    Though there are several possible outcomes, many stars begin to gradually shed the outer atmosphere to deep space. This is the beginning of a planetary nebula.

    As the core continues its collapse it emits extreme ultraviolet radiation. The radiation ionizes the gasses of the nebula giving rise to a wonderfully colorful and intricate design.

    In this case, the stellar parent is a binary star system. This pair, one dying, sculpts a unique and beautifully complex nebula. Romantic or cannibalistic?

    As always, enjoy and let me know what you think in the comments!



    Jason Guenzel
    License: None (All rights reserved)

    Sky plot

    Sky plot


    Sh2-71 - A Complex Planetary, 


            Jason Guenzel