Image of the day 10/11/2017

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    SH2-129 & Ou4 Flying Bat & Squid Nebula, 




    

        Douglas J Struble
    SH2-129 & Ou4 Flying Bat & Squid Nebula

    SH2-129 & Ou4 Flying Bat & Squid Nebula

    Technical card

    Resolution: 3357x4199

    Dates: Sept. 28, 2017Oct. 2, 2017

    Frames:
    Astrodon Ha 5nm: 60x240" (gain: 139.00) -20C bin 1x1
    Astrodon OIII 3nm: 509x240" (gain: 139.00) -20C bin 1x1

    Integration: 37.9 hours

    Darks: ~50

    Flats: ~50

    Bias: ~250

    Avg. Moon age: 9.57 days

    Avg. Moon phase: 70.72%

    Bortle Dark-Sky Scale: 6.00

    Astrometry.net job: 1757469

    RA center: 317.365 degrees

    DEC center: 60.159 degrees

    Pixel scale: 2.315 arcsec/pixel

    Orientation: 67.276 degrees

    Field radius: 1.728 degrees

    Locations: Backyard Red Zone Observatory, Taylor, MI, Michigan, United States

    Data source: Unknown

    Description

    Sharpless 129 is an H-alpha emission nebula commonly called the Flying Bat Nebula located in Cepheus very close to the famous IC 1396 (the nebula that contains the Elephant's Trunk). The large blue/green nebula inside it, which is over a degree long, is formally known as Ou4 but is colloquially called the Squid (or Giant Squid) Nebula. Ou4 is remarkable for having been discovered very recently, in 2011, by amateur astronomer Nicolas Outters (hence the "Ou" in "Ou4"). It was originally called a planetary nebula but is now thought to be some kind of bipolar outflow from the bright blue star at its center (which is HR 8119).

    Comments

    Author

    dugstruble
    Douglas J Struble
    License: None (All rights reserved)
    151040
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    SH2-129 & Ou4 Flying Bat & Squid Nebula, 




    

        Douglas J Struble