NGC 6992, also known as the Eastern Veil Nebula and Caldwell 33, is a supernova remnant that is part of a large complex known as the Veil Nebula, Cygnus Loop, or Cygnus SNR. This image shows just the Eastern portion of this complex. The Veil Nebula was discovered on September 5, 1784 by William Herschel and shines with a 7.0 apparent magnitude. Although we know it is located in the constellation Cygnus, the distance to the nebula is not precisely known, recent evidence supports that it lies about 1,470 light-years away. Some 5 to 8 thousand years ago the source supernova exploded and the remnants have since expanded to cover an area about 6 times the diameter of the full moon. Telescope: Stellarvue Raptor SVR105 @ f/7 Accessories: Stellarvue SFF7-21 flattener; Dew control by Dew Buster; Alnitak Flat-Man Mount: Takahashi EM-200 Temma2 Camera: Celestron Nightscape OSC CCD @ 0ºC Guiding: Starlight Xpress Lodestar via PHD on piggy-backed SVR80 Filters: None Exposure: 84 x 300 sec. binned 1x1 Acquisition: Celestron AstroFX Processing: Calibration, DDP in Images Plus v5.0 beta; Registration in Registar & ImagesPlus Post-processing: ImagesPlus v5.0 beta; Adobe Photoshop CS5 Date(s): August 19, 20, 22, 2012 SQM reading (begin - end): N1:19.36 - 19.39; N2:18.94 - 19.39; N3:18.68 - 19.18 Temperature (begin - end): N1:67.6ºF - 63.9ºF; N2:68.9ºF - 63.5ºF; N3:76.6ºF - 69.8ºF Location: Hendersonville, TN, USA