The Cygnus Wall


Matthew Foyle

Bakewell, Derbyshire

12 x 20min Ha
15 x 20min Oiii
15 x 20min Sii
Total time = 14hrs

QHY9M CCD cooled to -20c
Takahashi 106ED running at f/5
EQ8 Pier Mounted
Baader Ha (7nm), Oiii (8.5nm) and Sii (8nm) 2″ filters
Guided with a 60mm Baader Vario finder scope and QHY5iiL camera

Captured using Sequence Generator Pro
Guided with PhD
Processed with PixInsight and Photoshop CC

Here is my Narrow band Version of The Cygnus Wall. As per usual I’m suffering as a UK imager and have done very little this year due to the weather. This image was taken over three nights but the first night was an equipment test and I only managed around 2hrs 40min of exposure. However a few days later there were 2 full clear(ish) nights that allowed me to get another 12hrs to add to the starter image.

As always with my images I spent quite a long time calibrating the images using PI and then went on to do limited post processing in PI and Photoshop. I do believe in letting the data speak for itself. I was however amazed to see the depth in the dust lanes and the Hydrogen clumps and stream along the back edge of the wall as I’ve not seen these before as this is an area that often gets stretched away in processing. Also of note is the central column along the wall, it actually looks like a tube in this image with clumps of Ha hanging around it. Of additional note is the Variable star V0521 Cyg that is illuminating the background nebulosity in the large dark lane in the middle. This is a star that varies between mag 14.3 and 16.6, however it took the help of a friend to identify is as we both had never seen it illuminating it’s surrounding area, especially on a wide field view like this one.