NGC 7822 is a huge star nursery in constellation Cepheus about 300 light years away. The glowing gas clouds are powered by one of the hottest stars in our neighborhood. Its surface temperature is about 45’000 degrees Kelvin and its luminosity outshines our sun by a factor of 100’000. This picture only shows the inner part of the cloud complex. The full object is by far too large for the field of view of my telescope.

A crop of the photo is shown below.

Acquisition Details

Scope: Borg 90FL/500 with 1.08x Flattener
Filter: IDAS NBZ
Camera: ZWO ASI 2600MC Pro
Mount: Skywatcher HEQ5 Pro
Guiding Scope: MiniBorg 50
Guiding Camera: ZWO ASI 290MM
Guiding Software: PHD2
Acquisition Software: N.I.N.A.
Light Frames: 60x300sec in two nights
Flats, Dark Flats, Bias, Darks
Camera settings: Gain 100, Offset 20
Bortle 4-5, 40% moon
Acquisition Dates: September 01 and 04, 2021

Processing

Imaging & Stacking: PixInsight
Denoise: Topaz AI Denoise
Star halo removal: Gimp

An alternative processing is shown here.