NGC 6992 – The Eastern Veil in Bicolor | Craig & Tammy Temple

Photographer
Craig & Tammy Temple
Email
ctastroimager@gmail.com
Location of photo
Hendersonville, TN, USA
Date/Time of photo
June 30, 2011 & July 2, 2011
Equipment
Telescope: Stellarvue Raptor SVR105 @ f/7 Accessories: Stellarvue SFF7-21 flattener; Dew control by Dew Buster Mount: Orion Atlas EQ-G controlled by EQMOD performance tuned by Astrotroniks Camera: QSI583wsg CCD @ -10.0C Guiding: Starlight Xpress Lodestar via PHD Filters: Astrodon 5nm Ha, OIII Exposure: 12 x 20min. OIII, 11 x 20min. Ha Acquisition: ImagesPlus 4.0c Camera Control Processing: Calibration, DDP in Images Plus v4.0 Post-processing: Adobe Photoshop CS5 using Steve Cannistra’s bi-color combination technique Date(s): June 30, 2011 & July 2, 2011 SQM reading (begin - end): N1:19.21-19.20; N2:19.00-clouds Temperature (begin - end): N1:76.8ºF-68.5ºF; N2:78.8ºF-73.8Fº
Description
Found in the constellation Cygnus, the Eastern Veil Nebula supernova remnant, also known as Caldwell 33, is comprised of three portions. The brighter portion, NGC 6992, connects with NGC 6995 and IC1340 and is displayed here in "bi-color" representation. Narrowband filters were used to isolate the H-alpha and OIII emissions and reveal the structure of the nebula. Discovered in 1784 by William Herschel, The Veil complex (or Cygnus Loop) appears dim since it is spread over a large area. The source supernova violently exploded some 5,000 - 8,000 years ago leaving only these expanding filaments behind.
Website
http://cntastro.smugmug.com