Horsehead and Flame Nebulae

Discussion in 'My Astrophotos' started by Jason, Sep 13, 2019.

  1. Jason

    Jason Cyanogen Customer

    Joined:
    Oct 11, 2016
    Messages:
    30
    Location:
    Long Beach, CA
    Astro-Physics RH305 f/3.8
    STXL-16200 at -20°C
    1.1"/pixel (measured)
    60 x 2-min 5-nm H-alpha
    Dark subtraction, astrometric alignment, median stacking, histogram stretch
    All processing in Maxim DL

    I'm very happy with the minimal diffraction from the microlenses, really only barely evident on mag 1.7 Alnitak and it's neat to see the the Alnitak C-component at mag 9.6 (nearby star to left of Alnitak, 60" at PA 10°) as well as a mag 14.8 faint star to the right of Alnitak (45" at PA 175°). I see no evidence of the mag 9.6 B-component (2.2" at PA 167°).

    Throughout the rest of the image, away from Alnitak's glare, there are 16th-mag stars visible in this H-alpha image, which is pretty remarkable for 2-min subs and a 5-nm bandpass!

    (Is that amp glow in the lower right? The image is rotated 180°, so the artifact was originally at upper left.)
     

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  2. Doug

    Doug Staff Member

    Joined:
    Sep 25, 2014
    Messages:
    6,170
    That is a beautiful shot! Love that field.

    (Could be amp glow, though that would be unusual given proper dark subtraction.)
     

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