Hemisphere:  Northern  ·  Constellation: Orion (Ori)  ·  Contains:  The star μOri

Image of the day 04/12/2021

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    Abell 12 Hidden Nebula, 



    
        

            Derek Santiago
    Abell 12 Hidden Nebula
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    Abell 12 Hidden Nebula

    Technical card

    Imaging telescopes or lenses: Celestron C9.25 Edge HD Celestron C9.25 EdgeHD

    Imaging cameras: QSI640WSG

    Mounts: Avalon Instruments Avalon M-Uno

    Guiding cameras: Starlight Xpress Lodestar X2

    Software: Photoshop CC 2017  ·  APT - Astro Photography Tool

    Filters: AstroDon 5nm H-Alpha 3nm Oiii filter  ·  Astrodon Green E-Series Gen II 1.25"  ·  Astrodon Red E-Series Gen II 1.25"  ·  Astrodon 1.25" Blue Tru-Balance E-Series Gen 2  ·  Astrodon 1.25" Lum Tru-Balance E-Series Gen

    Accessory: Optec TCF focuser


    Dates:Jan. 11, 2016April 4, 2021

    Frames:
    AstroDon 5nm H-Alpha 3nm Oiii filter: 30x600" -15C bin 2x2
    Astrodon 1.25" Blue Tru-Balance E-Series Gen 2: 20x180" -15C bin 1x1
    Astrodon 1.25" Lum Tru-Balance E-Series Gen: 20x180" bin 1x1
    Astrodon Green E-Series Gen II 1.25": 20x180" -15C bin 1x1
    Astrodon Red E-Series Gen II 1.25": 20x180" bin 1x1

    Integration: 9.0 hours

    Avg. Moon age: 11.86 days

    Avg. Moon phase: 25.80%

    Bortle Dark-Sky Scale: 8.00

    Mean SQM: 17.80

    Temperature: -15.00


    Basic astrometry details

    Astrometry.net job: 4377196

    RA center: 6h 2' 21"

    DEC center: +9° 38' 42"

    Pixel scale: 0.646 arcsec/pixel

    Orientation: 177.179 degrees

    Field radius: 0.249 degrees


    Resolution: 1964x1964

    Data source: Backyard

    Description

    Abell 12, Magnitude 12.4 Planetary Nebula in Orion.
    Often called the "Hidden Nebula" because it is very difficult to observe and image due to its proximity to Mag 4 star, Mu Orionis

    Imaging Camera: QSI540 wsg
    Imaging Scope: 9.25" Celestron edge at F/10
    Guide Camera: SX Lodestar x 2, PHD2
    Mount:Avalon M Uno
    Filters: Astrodon
    Exposure: 2.5 hours 5nm OIII and 2.5 hours 5nm Ha, binned X2, 10 minute subs.
    1 hour each LRGB unbinned, 3 minute subs.
    Processing: CCD Stack and PS CC.
    Date: 1/6/16, 1/11/16 Reprocessed with additional data 4/4/21
    Location: My front driveway. Morristown, NJ

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    Abell 12 Hidden Nebula, 



    
        

            Derek Santiago