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Contains:  Cocoon nebula, IC 5146

Image of the day 08/12/2017

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    Going deep on the Cocoon, 


            Kevin Morefield
    Going deep on the Cocoon

    Going deep on the Cocoon

    Technical card

    Imaging telescope or lens:Planewave CDK14

    Imaging camera:SBIG STX 16803

    Mount:Paramount ME II

    Guiding telescope or lens:Planewave CDK14

    Guiding camera:SBIG STX 16803

    Software:CCDWare CCDStack 2Adobe Photoship CCCCDWare CCDAutoPilot 5

    Filter:Baader 50mm H7,O8,S8 and LRGB

    Resolution: 4068x3288

    Dates:July 25, 2017

    Frames: 179x600"

    Integration: 29.8 hours

    Avg. Moon age: 2.32 days

    Avg. Moon phase: 5.94% job: 1675782

    RA center: 328.367 degrees

    DEC center: 47.277 degrees

    Pixel scale: 0.728 arcsec/pixel

    Orientation: -130.088 degrees

    Field radius: 0.529 degrees

    Locations: Sierra Remote Observatory, Auberry, California, United States

    Data source: Own remote observatory

    Remote source: Sierra Remote Observatories


    IC 5146, the Cocoon Nebula, is a great collection interesting celestial sights. the glowing red hydrogen and blue reflection nebulae paid with a young star cluster and dark nebulae. There are even cameos by three small spiral galaxies. Interestingly, the star at the center of the nebula is believed to be only a few hundred thousand years old (at the time these photons were created) making it the star equivalent of a human baby perhaps weeks old.

    This is an all LRGB combination comprised of 35 Luminance, 50 Red, 54 Green, 40 Blue all 600 seconds. Total integration 29.833 hours. It may seem odd that there is less Luminance time than color but the color is bin 1x1 and adding more really helped with noise in the dark nebula portions. That and I pruned Lum subs pretty heavily. One of the reasons I shot the color bin 1 is to be able to add it to the luminance as a synthetic blend but I have not done that yet so this is straight LRGB only.

    Subs were calibrated in CCDStack, subsequently processed in PI with minimal DBE and TGV De-noise. No sharpening was applied as it seems to only add noise but not improve sharpness. A light motion blur de-convolution was applied in PI to resolve slightly out of round stars. Finishing touches in PS and Apple photos.



    Kevin Morefield

    Sky plot

    Sky plot


    Going deep on the Cocoon, 


            Kevin Morefield