NCG 2174 is an emission nebula in constellation Orion. It is associated to open star cluster NGC 2175 which delivers the energy which powers the radiation of the gas.

This is a final processing result pushing the blue inner part. Normally is it shown in red, result of prominent Halpha radiation from hydrogen.

Acquisition Details

Scope: Borg 90FL/500 with 0.72x Reducer
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: 21x300sec
Flats, Dark Flats, Bias, Darks
Camera settings: Gain 100, Offset 20
No moon
Bortle 4-5
Acquisition Date: Jan 8, 2021

This was one of these days: lost acquisition computer just when everything was ready … and had to find another computer quickly … bad luck.

Processing

Stacking Software: DSS
Imaging: PixInsight (for the final version)

I also created a reddish processing result with PixInsight (not splitting channels). The contrast is somewhat higher in this version.

Prior to that a had a try with Siril which also gave some nice results.

And even before … I just used Gimp.