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Contains:  Cocoon nebula, IC 5146
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C19  Coocon nebula, 


C19  Coocon nebula

C19 Coocon nebula

Technical card

Imaging telescope or lens:Celestron C8 CPC 800 XLT

Imaging cameras:ATIK Titan monoCanon 550D

Mount:Celstron CPC800 alt/az

Guiding telescope or lens:TS APO TS ED 70

Guiding camera:ATIK Titan mono

Software:Pisinsight 1.8

Accessories:TS Optics Barlow 2,5x APOCelestron equatorial wedge

Resolution: 3427x2737

10x180" ISO1600 -1C
20x300" ISO1600 -1C
Astronomik Eos-Clip UHC-E: 20x240" ISO1600 -1C

Integration: 3.5 hours

Darks: ~11

Flats: ~41

Bias: ~34

Bortle Dark-Sky Scale: 4.33

Temperature: 1.00 job: 1369569

RA center: 328.349 degrees

DEC center: 47.208 degrees

Pixel scale: 0.786 arcsec/pixel

Orientation: 177.159 degrees

Field radius: 0.479 degrees

Locations: Spectre Observatory, Castello Tesino, Trento, Italy


IC 5146 (also Caldwell 19, Sh 2-125, and the Cocoon Nebula) is a reflection[1]/emission[2] 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.[3] It shines at magnitude +10.0[4]/+9.3[2]/+7.2.[5] 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.[1][4] 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.[5] 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.




License: None (All rights reserved)

Sky plot

Sky plot


C19  Coocon nebula,