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:



Tuesday, September 6, 2016

NGC 7789 "Caroline's Rose" open cluster

The cluster in a contellation Cassiopeia is named for Caroline Herschel who discovered it in 1783.
It lies about 8000 light-years away.

Kyiv (Osokorky district)

Angular size of the image is 2.14 x 2.14 deg
Canon EOS 600D + Jupiter37A (old clone of Sonnar 135 f/3.5) @f/5.6 on motorized EQ5; ISO=800; 19x120sec; 11 darks, 11 biases, 7 flats. IRIS+FITStacker+FSWorks4+RawTherapee+PixInsightLE

Wide-field view (captured with EF-S 18-55mm lens @18mm). A position of the above picture is depicted by the yellow square.