Observation by Graham Roberts: Sadr Region HOO

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Graham Roberts


Graham Roberts


2022 Aug 12 - 22:00


2022 Sep 06 - 14:11


The Gamma Cygni Nebula (IC1318)
The Crescent Nebula (NGC6888)

Planetarium overlay



Field centre

RA: 20h16m
Dec: +38°49'
Position angle: +91°21'

Field size

7°42' × 5°48'


Sadr Region HOO

About this image

In 1969 H.R. Dickel, H. Wendker and J. H. Bieritz (DWB) developed a catalogue of 193 optically visible HII objects in the Cygnus-X region of the Cygnus constellation.  Ever since I discovered the presence of this work and the numerous opportunities this HII-rich region provides for astrophotography I’ve wanted to image its vast grandeur in one image, which now became a possible with my new Samyang 135 imaging rig.

Here I've chosen to frame the image in such a way as to encompass some familiar objects, such as the Butterfly Nebula (IC1318) and the Crescent Nebula (NGC6888), anchored by Sadr, the yellow-white supergiant star that stands out from within the very large Cygnus-X region.  Processed here in HOO the final image provides a magnificent view of this large, interesting area.

Samyang 135 @ f2.8 & ZWO ASI1600MM-Cool

Ha 36 x 300s

OIII 36 x 300s

Total Integration 6-hours

For further image informatiion & background information, please refer to my website here:  https://watchthisspaceman.wordpress.com/2022/09/05/shrinking-the-universe/


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Nick Hewitt
Nick Hewitt, 2022 Sep 06 - 15:38 UTC

Fab image. Where was your location?

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