NGC 2024 and B33 (Ori)

NGC 2024 and B33 (Ori)

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Date/Site: December 28., 2008, AAR-observatory in Presberg
Exposure/
Filter:
L: 8 x 10 minutes (-30°C)
red, green and blue: 6 x 10 minutes (-30°C)
Camera: SBIG ST10XME, motorized Atik-filterwheel with Astronomik-RGB-filters
Optics/
Instrument:
4"-TMB-refractor on the Gemini 41 Field mount of the AAR
focusing by hand with the aid of MaximDL 4.6
Deblooming, darks, alignment and stacking: MaximDL,
levels and curves: Photoshop CS

Remarks: good tranparency, sometimes an easterly gale, -5°C, imaged together with Tobbe Konz.
Removal of the blooming-artefacts of Zeta Orionis is a form of higher magic, which is beyond my reach.
Reflections of bright Alnitak on the filter-surfaces and in the refractor-optics added some bias.
Here is an earlier version of the same object:

Flame-nebula near Zeta Orionis with the horsehead-nebula

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Datum: November 9., 2008
Optik/Camera: same setup as above
Exposure/
Filter:
L: 13 x 5 minutes
red and green: 3 x 5 minutes (-25°)

Remarks: occasionally very good tranparency; moon; storm with strong gusts and passing clouds coming in before an approaching cold front.
Because thick clouds rolled in I had to stop before I could make images for the blue channel, so only a b&w-image of the combined L-, R- and G-images is presented.

© Friedhelm Hübner, last revision:  17.01.2021