IC 5146

9 ноября кокон

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 +10.0/+9.3/+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 clusterM39.[1][4] The cluster is about 4,000 ly away, and the central star that lights it formed about 100,000 years ago; 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.

Imaging telescopes or lenses:SKYWATCHER Black Diamond 200/1000

Imaging cameras: canon EOS 1000 D

Mounts: Skywatcher HEQ5 PRO

Guiding telescopes or lenses: ORION Mini guide 50mm

Guiding cameras: ORION StarShoot AutoGuider

Filters: Baader UHC-s

Resolution: 1500×999

Dates: Oct. 29, 2014

Frames: 60×180″

Integration: 3.0 hours

Avg. Moon age: 5.14 days

Avg. Moon phase: 26.99%

RA center: 328.341 degrees

DEC center: 47.266 degrees

Pixel scale: 2.738 arcsec/pixel

Orientation: 14.655 degrees

Field radius: 0.685 degrees

Astrophotography of the dey of SPONLI, 09.11.2014
Аuthor: BrunoD