Cygnus Broadband Widefield
(place cursor over image to view a narrowband version with labels)

Barnard Plate
Copyright Steve Cannistra

More versions of this image
Please click here for a medium view (30%)
Please click here for a larger view (40%)
Please click here for a larger ROLLOVER with my narrowband image, with LABELS
Please click here for this field of view in narrowband light

Magnitude:  Not Applicable
Size: FOV of full frame image (uncropped) = 3.9 x 3.9 degrees
RA: 20h 19m 08s (J2000)
Dec: 39 degrees 40' 27" (J2000)
PA:  +270 degrees

Please keep your cursor outside of the image to see the broadband version, and place it over the image to see the narrowband, labeled version.  The region around the star Sadr, also known as Gamma Cygni, is full of emission nebulosity (designated SH-108 which includes IC 1318).  IC 1318B is located within the constellation Cygnus and is close to other famous landmarks along the summer Milky Way, like the Pelican and North American Nebulae, the Crescent Nebula (upper right), and the Bubble.  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).  The above image was taken with broadband (RGB) filters.  A previous image of mine from 2013 shows a mapped color composite in which SII is mapped to the Red channel, HII is mapped to Green, and OIII is mapped to Blue (Hubble Palette).  More information about this region can be found at Rob Gendler's website.

Photographic Details:
Dates:  August 27 and 28, 2014
Scope:  Takahashi FSQ106 at f5 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 broadband filters, 50mm square
Exposures:  Total RGB exposure 9 hours.
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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