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Crescent_Nebula.jpg
The Crescent Nebula and surrounding nebulosity1380 viewsThe Crescent Nebula (NGC 6888) is in the constellation Cygnus. The brighter portion of the surrounding nebulosity in the upper left is IC 1318, which is part of the gamma Cygnus nebulae complex. The bright star in the center of the Crescent Nebula is a Wolf-Rayet star, which are extremely luminous and hot stars that loose mass at very high rates, designated as HD 192163. The image is a total exposure of 1 hr 45 min (21 X 300 sec) taken with a Takahashi E-180 f/2.8 astrograph and Canon 20Da DSLR camera.
Crescent_nebula-1.jpg
Crescent Nebula997 viewsThe Crescent Nebula is an emission nebula in the constellation of Cygnus. It is also know as NGC 6888. The photo consist of 30 x 3 minute photos utilizing a Canon 60Da on a Celestron 8" Newtonian taken on 27 and 31 Oct. Images were stacked in Nebulosity with levels and curves adjusted with Photoshop CS6.
The_Crescent_Nebula_Ha5xOIII.jpg
The Crescent Nebula in Ha and O[III]726 viewsThe Crescent Nebula (NGC 6888) is an emission nebula found in the constellation Cygnus. The emission is powered by strong stellar winds from a Wolf-Rayet star colliding with previously expelled outer envelopes of the stars atmosphere. This 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 MaxIm DL 6.08; Processed in PixInsight 1.8.4.1185 Ripley (x64). The calibrated, aligned, and integrated Ha and O[III] images were stretched using Masked Stretch, Ha stretch matched to O[III] with Linear Fit, and combined using Pixel Math.
SHOcombineFinal.jpg
Narrowband image of the Crescent Nebula in Cygnus817 viewsThe 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.
CrescentNebula.jpg
The Crescent Nebula in Cygnus682 viewsThe Crescent Nebula (NGC 6888) is an emission nebula found in the constellation Cygnus. A leading hypothesis suggests that the strong stellar winds from the central Wolf-Rayet star collides with the stars outer atmospheric envelope ejected in a previous evolutionary phase, which energizes the nebula and leads to the observed structure. This H alpha image is a total of 5 hours of exposure taken with a Takahashi CCA-250 f/5 astrograph and QSI683wsg camera (Astrodon 5 nm Ha filter) on a Paramount ME; August 11th , 13th 2015 in Mayhill, NM (15 x 1200 sec lights @ -20o C; 21 darks; 126 bias; 128 flats) Image acquisition MaxIm DL 6.08; Calibration, alignment, integration, and processing in PixInsight 1.8.4.1107 Ripley (x64).
     
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