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Narrowband image of the Crescent Nebula in Cygnus
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.
Polaris2.jpg NGC_2264.jpg SHOcombineFinal.jpg Saturn_2015_05_31_C9_25_f30_21AU618.jpg M45_in_the_constellation_Taurus.jpg
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