Hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  NGC 7023

Image of the day 11/22/2014

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    Iris Nebula LRGB, 



    
        

            Deep Sky West (Lloyd)
    Iris Nebula LRGB
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    Iris Nebula LRGB

    Technical card

    Imaging telescopes or lenses: Takahashi FSQ-106EDXIII

    Imaging cameras: QSI 683 wsg-8

    Mounts: Paramount ME

    Guiding telescopes or lenses: Takahashi FSQ-106EDXIII

    Guiding cameras: Lodestar

    Software: PixInsight 1.8  ·  Software Bisque The Sky X Pro  ·  Focus Max  ·  Cyanogen Maxim DL5 ver. 5.24

    Filters: Astrodon Luminance Tru-Balance E-Series Gen 2  ·  Astrodon Red Tru-Balance E-Series Gen 2  ·  Astrodon Blue Tru-Balance E-Series Gen 2  ·  Astrodon Green Tru-Balance E-Series Gen 2


    Dates:Nov. 1, 2014

    Frames:
    Astrodon Blue Tru-Balance E-Series Gen 2: 16x900" bin 1x1
    Astrodon Green Tru-Balance E-Series Gen 2: 12x900" bin 1x1
    Astrodon Luminance Tru-Balance E-Series Gen 2: 46x900" bin 1x1
    Astrodon Red Tru-Balance E-Series Gen 2: 16x900" bin 1x1

    Integration: 22.5 hours

    Avg. Moon age: 8.87 days

    Avg. Moon phase: 65.56%


    Basic astrometry details

    Astrometry.net job: 416345

    RA center: 21h 0' 46"

    DEC center: +67° 42' 10"

    Pixel scale: 2.095 arcsec/pixel

    Orientation: -89.497 degrees

    Field radius: 1.193 degrees


    Resolution: 620x465

    Locations: Sierra Remote Observatory, Fresno, CA, United States

    Description

    LRGB of the ever popular Iris Nebula. Tried to go deeper than in previous attempts from home observatory. Actually aborted a mosaic that was to include LBN486 in the same field. A larger chip than the 8300 series would have easily included both DSOs in the same FOV of the FSQ-106 @f/5...maybe next time.

    Processing proved interesting as with all dark nebulae objects in that the dark, low signal areas are noise magnets and are very difficult to process without the overall image becoming overly smooth in appearance. Creative masking helps to solve this problem. Additionally The Iris is an HDR target so treatment of the blue reflection nebula is critical. I don't know if I've achieved the sought after balance yet, but all constructive critical commentary is welcome.

    Comments

    Revisions

    • Final
      Iris Nebula LRGB, 



    
        

            Deep Sky West (Lloyd)
      Original
      Iris Nebula LRGB, 



    
        

            Deep Sky West (Lloyd)
      B
      Iris Nebula LRGB, 



    
        

            Deep Sky West (Lloyd)
      C

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    Iris Nebula LRGB, 



    
        

            Deep Sky West (Lloyd)

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