Gamma Cygni (Sadr) is a star at
the center of the Northern Cross
in Cygnus.

There is a large area of
nebulosity surrounding this star,
including the Butterfly Nebula
(IC 1318). Off to the right bottom
of the frame is the famous
Crescent Nebula (NGC 6888).
Click
HERE for a close-up of
the Crescent with a higher focal
length instrument.

This mosaic was processed as
a bicolor, using just Ha and OIII
data, which were assigned to
the red and blue channels,
respectively. The green channel
was synthesized from the other
two by a
technique in
Photoshop.

Click
HERE for a crop of this
image that places Sadr dead
center.
Takahashi FSQ 106N at f/5
P
aramount ME
S
BIG STL 11K
B
aader Filters

2 frame mosaic
Ha & OIII Bicolor:

Ha=  
9 hrs per frame
OIII=
9 hrs per frame

Data acquired
from NMS
(2008) and home
observatory in
Pennsylvania (2015)


Processed with Maxim,
PixInsight, Neat Image,
and Adobe PS.
       Gamma Cygni Region
     Click on image to enlarge