The Cygnus Loop and Open Cluster NGC6940

Bob Lockwood
Location of photo
Date/Time of photo
Nikon 180ed lens open to f/5.6 Astro-Physics 900 GTOCP3. SBIG-STL6303E @-20c Guided by TV60 / SBIG-RGH
Ha,Olll,RGB, 240-240-100-100-100, Ha to red-16x15min, Olll to blue & green- 16x15min. RGB-10x10min.ea. All (bin 1x1) The Cygnus Loop is a large supernova remnant (SNR) in the constellation Cygnus, an emission nebula measuring nearly 3° across. Some arcs of the loop are known as the Veil Nebula. The three main components of the Cygnus Loop consists of,  The Western Veil, NGC6960, C34. The Eastern Veil, NGC6992, C33. Pickering’s Triangle, NGC6979  Open Cluster NGC6940 is to the lower right.
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