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Contains:  NGC 6914, gamma Cyg nebula, IC 1318, Crescent nebula, NGC 6888, NGC 6883, IC 1311, NGC 6871, The star ω1Cyg, The star 29Cyg, The star 28Cyg, The star 22Cyg, The star 34Cyg, The star 30Cyg, The star 32Cyg, The star ηCyg, The star 31Cyg, The star Sadr (γCyg), Part of the constellation Cygnus (Cyg)

Image of the day 12/21/2019

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    Large field on the Swan costellation, 


    Large field on the Swan costellation

    Large field on the Swan costellation

    Technical card

    Resolution: 6962x3297

    Astronomik Deep-Sky RGB filter: 74x60" bin 1x1
    Astronomik Deep-Sky RGB filter: 22x600" -25C bin 2x2
    Astronomik OIII 6NM Astronomik: 32x900" -25C bin 1x1
    Astronomik OIII 6NM Astronomik: 8x1800" -25C bin 2x2
    Astronomik H-alpha-CCD with 6nm: 40x900" -25C bin 1x1
    Astronomik H-alpha-CCD with 6nm: 5x1800" -25C bin 2x2

    Integration: 29.4 hours

    Darks: ~23

    Flats: ~75

    Bias: ~100 job: 3119337

    RA center: 20h 12' 9"

    DEC center: +40° 54' 32"

    Pixel scale: 8.564 arcsec/pixel

    Orientation: 268.089 degrees

    Field radius: 9.163

    Data source: Traveller


    The photo represents a vast area of sky in the constellation of the Swan and includes numerous nebulae such as the Crescent, the Tulip, the nebular complex of Ic 1318, the Propeller nebula, the small blue reflection nebulae Ngc 6914 and covers about 16 degrees by 8 degrees.
    The photo is a mosaic of 3 panels taken using the filters Ha, OIII, R, G, B. I used for the shooting my new purchase, the Samyang 135mm f / 2.0 that really surprised me with its quality as I was able to use it setting the aperture to f / 2 and f / 2.8. The Crescent and the Ngc 6914 were made with the Skywatcher ED 80 refractor in 2x2 binning to get some more details.
    In the elaboration I highlighted out the weakest structures of the nebulae producing therefore a final result, in terms of details, very similar to the black and white photo that comes out of the H alpha file once it has been made a stretch but with in addition also the colors of the very few nebulae that appear using the OIII filter (WR 134 Ring Nebula, the external parts of the Crescent, the Soap Bubble and the traces of nebulosity on a star in the right area of the photo quite close to 2 bright stars, one blue and one yellow.



    License: None (All rights reserved)

    Sky plot

    Sky plot


    Large field on the Swan costellation,