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Object
............................................ IC 5146 - Cocoon nebula
Constellation .............................. Cygnus
RA / DEC
.....................................
21h:53m.29sec /
+47°
16m.01sec
Distance + Ap. Magnitude......... 3300 Light Years - 7.2
Date + Time ................................. 20/7 - 2/8 -2014
Location ....................................
Remote imaging from
"Nunki
Observatory" - Skiathos
Optics .........................................
Officina Stellare Advanced RILA 400
f/5.25
Tools ..........................................
The SKY X
Camera .....................................
SBIG STXL11002
with
FW8G-STXL (Astrodon filters)
Exposure Time.......................
Luminance: 12 X 600 sec , RGB : 6 X 600 (each)
More Details ...........................
Environment Temperature : 29oC Camera Temperature -25οC
Mount ....................................... Paramount
ME
Guiding .................................... Self guided
Processing Details ................ Photoshop ,
Maxim DL v6 , CCDStack 2
Notes ........................................ Weather:
Clear Transparence: Mediun Humidity : 72-89%
Target details .........................
IC 5146 (also Caldwell 19, Sh 2-125, and the
Cocoon Nebula) is a reflection/emission nebula and Caldwell
object in the constellation Cygnus. The NGC description refers to IC
5146 as a cluster of 9.5 mag stars involved in a bright and dark
nebula. The cluster is also known as Collinder 470. It shines at
magnitude +7.2. Its celestial coordinates are RA 21h 53.5m, dec+47°
16′. It is located near the naked-eye star Pi Cygni, the open
cluster NGC 7209 in Lacerta, and the bright open cluster M39.The
cluster is about 4,000 ly away, and the central star that lights it
formed about 100,000 years ago;[6] the nebula is about 12 arcmins
across, which is equivalent to a span of 15 light years.When viewing
IC 5146, dark nebula Barnard 168 (B168) is an inseparable part of
the experience, forming a dark lane that surrounds the cluster and
projects westward forming the appearance of a trail behind the
Cocoon. |
