This is the eastern part of a large but relatively faint supernova remnant in the constellation of Cygnus. The rope-like filamentary structures of the nebula are the visible remnants of the shock-wave from the supernova explosion that occurred some 5,000 to 8,000 years ago.
Right ascension: 20h 56m 59s | Declination: +31° 14′ 54″ | Distance: 1,470 Light Years
Field of view: 34 x 25 arcmin
Camera: Atik 314L+
Telescope: William Optics Megrez 120 F/7.5
Filters: Baader Ha (7nm), OIII (8.5nm)
Exposures: Ha 32 x 15 min; OIII 24 x 15 min
Total exposure: 14 hours
Image composition: RGB (Ha, OIII, OIII+20%Ha)
Scale: 1.48 arcsec/pixel
Image acquired: August & September 2011 from Bristol (UK)
Image capture with MaxIm DL, FocusMax, ACP; Image processed with MaxIm DL, CCDStack2, Photoshop CS4