NCG 2246 (Caldwell 439) is a star forming region in Monoceros about 5000 light years distant. The young star cluster NGC 2244 (Caldwell 50) in the center of this region has been formed from material of this cloud and is pushing the remaining material towards the outside. The nebula will disappear in some million years while still creating new stars …

Acquisition Details

Scope: Borg 90FL/500 with 1.08x Flattener
Filter: IDAS NB1
Camera: ZWO ASI 2600MC Pro
Mount: Skywatcher HEQ5 Pro
Guiding Scope: MiniBorg 50
Guiding Camera: ZWO ASI 290MM
Guiding Software: PHD2
Acquisition Software: APT
Light Frames: 30x300sec
Flats, Dark Flats, Bias, Darks
Camera settings: Gain 100, Offset 20
No moon
Bortle 4-5
Acquisition Date: Jan 8, 2021

Processing

Stacking Software: DSS
Imaging: PixInsight

Apparently I had some focussing issues and the distance between flattener and sensor chip was not correct. So you might see quite some coma in the corners.

Here a few color variants. Which is your choice?

Before I processed a bit wildly in PixInsight and got results with to much contrast …

Gimp was the choice before PixInsight. This gave we more reddish results.