Cygnus Widefield

All Images Copyright Steve Cannistra

Please click here for a larger view (80%)
Please click here for a version with labels

Magnitude:  Not determined
Size: FOV  = approximately 22 degrees x 11 degrees
RA: 20h 31m 05s (J2000)
Dec: 44 degrees 18' 46" (J2000)

This image represents a widefield mosaic of two large panels taken with a 200mm Pentax lens (11 deg x 11 deg each panel) and the U16M camera.  The region around the star Sadr, also known as Gamma Cygni, is full of emission nebulosity (designated SH-108 which includes IC 1318).  IC 1318 is located within the constellation Cygnus, which includes famous landmarks along the summer Milky Way, like the Pelican and North American Nebulae and the Crescent Nebula.  Please click the link to the labeled version above for more details.  Other images that I've taken of this region include a higher resolution version of the North American and Pelican Nebulae, as well as a higher resolution version of the Gamma Cygni region.  This area is very rich sulfur, hydrogen, and oxygen gases which are excited by high energy stars in the region to emit in SII (around 672nm), HII (656nm), and OIII (around 495nm).  More information about this region can be found at Rob Gendler's website.

Photographic Details:
Dates:  August 13, 14, 15, 16, 2015
Scope:  Pentax 200mm lens at f5.6 on the Takahashi NJP Mount
Autoguider:  SBIG ST-402 with 60mm guidescope, focal length 227mm
Camera:  Apogee U16M at -20C, with 7 position 50mm square filter wheel (Apogee FW50-7S)
Baader narrowband and LRGB filters, 50mm square
Exposures:  Ha, 6 hours (3 hours per panel, 2 panels); RGB, total of 6 hours (3 hours per panel, 2 panels).
Post-processing:  Calibrated, aligned, and stacked in Maxim, followed by DDP in ImagesPlus (IP).  Further processing in Photoshop CS (16 bit format).
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