Narrowband image of the Crescent Nebula in Cygnus

Posted by Steve Pastor
on Friday, October 30, 2015

The Crescent Nebula (NGC 6888) is found in the constellation Cygnus, whose emission is powered by strong stellar winds from a Wolf-Rayet star colliding with previously expelled outer envelopes of the stars atmosphere. This narrow band image is a combination of 5 hrs of H alpha data (Astrodon 5 nm Gen 2 filter) and 5 hrs 20 m of O[III] data (Astrodon 3 nm Gen 2 filter). Taken with a Takahashi CCA-250 f/5 astrograph and QSI683wsg camera on a Paramount ME; August 11th , 13th and Sept 14th - 17th, 2015 in Mayhill, NM (Ha, 15 x 1200 sec lights @ -20o C; O[III], 16 x 1200 sec lights @ -20o C 21 darks; 126 bias; 128 flats) Image acquisition with MaxIm DL 6.08; Calibrated, aligned, integrated, and processed in PixInsight 1.8.4.1185 Ripley (x64); Colors assigned ( Red = Ha, Green = 15% Ha + 85% O[III], Blue = O[III] ) and combined using SHO-AIP script.

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