Cygnus Widefield Mosaic in Hydrogen Alpha
Characteristics:
Magnitude: ?
Size: about 45'
Distance: 1,550 light years
RA: 20h 25m 32s
Dec: 40 degrees 18' 55"
Description:
This is a mosaic of two separate
images that I took in April and May of 2007. The region around
the star Sadr, also
known as Gamma Cygni, is full of emission nebulosity (designated IC
1318B). 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, and the
Bubble. This
area is very rich in stars, hydrogen emission, and bands of opaque
dust. Feel free to check out the links to larger versions of this
image (please allow time for full download).
Photographic Details:
Date: April 21, 2007 (right side) and May 8, 2007 (left side)
Scope: Takahashi
FSQ106 at f5 on the G11 Losmandy
Mount.
Autoguider: SBIG ST-402 with
e-finder.
Camera: STL11K -20C.
Filter: Baader 7nm
Ha filter.
Exposures: Right side: 8
x 20' unbinned; left side 5 x 20' unbinned. Total exposure 4.4 hours.
Conditions: Temperature 65-75 degrees F, good
transparency, average seeing. CCD was cooled to -20C on both
nights.
Post-processing:
Calibrated, aligned, and Sigma Clip combined
in Maxim, followed
by DDP
in ImagesPlus (IP). Further processing in Photoshop CS (16
bit format).
Please
note: Graphics on this website
may not be reproduced without author permission.
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