Tuesday, September 20, 2016

Gamma Cygni Region

A star Gamma Cygni (Sadr) is a supergiant surrounded by a complex of emission nebulas. It is catalogized as IC1318 (Butterfly Nebula) 
Canon EOS600D with Jupiter37A lens (a Soviet clone of Carl Zeiss Sonnar 135 f/3.5) @F/5.6 on motorized EQ5.
45 frame x 120 sec (ISO 800) + 23 darks + 23 offsets + 11flats.
Processed with IRIS, FITStacker, AstraImage, NoiseWare.
Kyiv (Osokorky district)

7,28x4,23 deg

Gamma Cygni -- a supergiant star -- is in the center of the image. The Butterfly emission nebula is above it.
The Crescent Nebula NGC 6888 is also visible to the bottom-left from the center: it is an outer shell of Wolf–Rayet star which is blown away by the intensive stellar wind.

9,18x6,06 deg


Annotated image (nova.astrometry.net)


[UPDATED]
Another threatment:



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