Region around Sadr (Gamma Cygni)

Sadr (Gamma Cygni)
Sadr (Gamma Cygni)

Gammy Cygni (Sadr) is the bright blue star in the center of this image. It is 1800 light years away and the nebulosity in this image (IC 1318) is far behind (4900 light years).

The star is a super giant having about 12 times the mass of the sun and shining 30000 as bright as the sun. It will burn its fuel rapidly and end its life in a supernova explosion not too far in the future.

The nebula (IC 1318) is a typical star nursery. The stars illuminating the gas clouds are not visible. They are hidden behind the dark molecular clouds and dust. Left from Sadr (in a blueish bubble) we also see NGC 6810, an open star cluster, physically related to all these nebula.

A crop image:

Sadr (Gamma Cygni)
Sadr (Gamma Cygni)

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: APT
Light Frames: 24x300sec
Flats, Dark Flats, Bias, Darks
Camera settings: Gain 100, Offset 20
Bortle 4-5, more than 80% moon
Acquisition Date: April 23, 2021


Stacking: DeepSkyStacker
Postprocessing: PixInsight, StarXterminator
Denoise: Topaz AI Denoise