The Cygnus Loop is a large supernova remnant in the constellation Cygnus, an emission nebula measuring nearly 3° across.Some arcs of the loop, known collectively as the Veil Nebula or Cirrus Nebula, emit in the visible electromagnetic range.
The visual portion of the Cygnus Loop is known as the Veil Nebula, also called the Cirrus Nebula or the Filamentary Nebula. Several components have separate names and identifiers,including the “Western Veil” or “Witch’s Broom”, the “Eastern Veil”, and Pickering’s Triangle.
This image is a 5×2 mosaic comprised of 10 panels. Each panel is a stack of 10-second subs, covering 75-100 minutes of imaging, taken over a 10-day period, in Bortle 5/6 skies, including the super moon evening, using the ZWO Seestar S50.
I used Stellarium to determine the center star, the AstroMosaic (ruuth.xyz) to determine the correct number of panels and overlap, Astrometry to determine the center coordinates of panels for re-shooting, and the Seestar-alp python script and Seestar_alp front-end running on a Raspberry Pi 4B to control the Seestar remotely. I used Siril to stack and process the panels, Image Composite Editor to stitch the mosaic, and Lightroom and Photoshop for finishes.
