Contains:NGC 2071, M 78, NGC 2068, NGC 2067, NGC 2064

Image of the day 01/13/2018

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    M78 - Another Beautiful Reflection Nebula in Orion, 




    

        John Hayes
    M78 - Another Beautiful Reflection Nebula in Orion

    M78 - Another Beautiful Reflection Nebula in Orion

    Technical card

    Resolution: 3999x3999

    Dates: Dec. 5, 2017Dec. 8, 2017Dec. 12, 2017

    Frames:
    Astrodon B Tru-Balance E-Series Gen 2: 12x1200" -25C bin 1x1
    Astrodon G Tru-Balance E-Series Gen 2: 13x1200" -25C
    Astrodon L Gen.2 E-series: 8x1200" -40C bin 1x1
    Astrodon Red Tru-Balance E-Series Gen 2: 10x1200" -40C bin 1x1

    Integration: 14.3 hours

    Darks: ~13

    Flats: ~13

    Bias: ~20

    Avg. Moon age: 20.46 days

    Avg. Moon phase: 64.33%

    Mean SQM: 21.80

    Mean FWHM: 2.20

    Temperature: 5.33

    Astrometry.net job: 1876884

    RA center: 86.703 degrees

    DEC center: 0.146 degrees

    Pixel scale: 0.476 arcsec/pixel

    Orientation: 179.800 degrees

    Field radius: 0.374 degrees

    Locations: Deep Sky West, Rowe, NM, United States

    Data source: Unknown

    Description

    M78 is a reflection nebula that's a part of the Orion Molecular Cloud complex. This area is a complex combination of reflection nebula and dark dust lanes and it's a region that I've wanted to image for many years. Now that I have a good view of the southern sky, it was finally possible. Unfortunately, mediocre seeing and occasional windy nights through the new moon cycle made it tough to accumulate enough high quality images to finish this image. I would have liked 1.5 x- 2x as much data but the conditions just wouldn't cooperate (at least for now.) Correctly color calibrating this image was particularly challenging because blue light from many of the stars in this region is filtered out so that they appear more red than they would in open space. Photometric calibration simply doesn't work well. I tried virtually every reference standard available before simply using the balance determined by the filters themselves (i.e. no calibration other than background neutralization.) Maybe I'll gather more data on this one to try to clean it up a bit but for now, I think that it's a pretty good start.

    As always, C&C is welcome so let me know what you think.

    John

    Comments

    Author

    jhayes_tucson
    John Hayes
    License: None (All rights reserved)
    131427
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    Revisions

      M78 - Another Beautiful Reflection Nebula in Orion, 




    

        John Hayes
      Original
      M78 - Another Beautiful Reflection Nebula in Orion, 




    

        John Hayes
      B
      M78 - Another Beautiful Reflection Nebula in Orion, 




    

        John Hayes
      C
    • Final
      M78 - Another Beautiful Reflection Nebula in Orion, 




    

        John Hayes
      D

    C

    Whitened faint red stars

    D

    De-emphasized slight gradient

    Sky plot

    Sky plot

    Histogram

    M78 - Another Beautiful Reflection Nebula in Orion, 




    

        John Hayes

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