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Contains:  Cocoon nebula, IC 5146
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IC 5146 The Cocoon nebula, 


            Barry Wilson
IC 5146 The Cocoon nebula
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IC 5146 The Cocoon nebula

Technical card

Dates:Sept. 23, 2019

Astrodon E-Series Blue filter: 27x300" bin 1x1
Astrodon E-Series Green filter: 28x300" bin 1x1
Astrodon E-Series Red filter: 28x300" bin 1x1
Astrodon Ha 3nm: 28x1200" bin 1x1
Astrodon Luminance E-Series: 36x600" bin 1x1

Integration: 22.2 hours

Avg. Moon age: 23.58 days

Avg. Moon phase: 35.03%

Basic astrometry details job: 3260262

RA center: 21h 53' 15"

DEC center: +47° 16' 51"

Pixel scale: 0.743 arcsec/pixel

Orientation: 89.641 degrees

Field radius: 0.441 degrees

Resolution: 3340x2676

Locations: Entre Encinas y Estrellas E-EyE, Fregenal de la Sierra, Extremadura, Spain

Data source: Own remote observatory

Remote source: e-EyE Extremadura


The Cocoon Nebula for me is an entrancing object, grand and majestic. This is my third imaging attempt and at the highest resolution and it still draws me with its blushing beauty. Choosing this target was a 'spur of the moment' thing when Steve and I were unsure of what to image next, distracted by 'stuff', and I plumped for this knowing it would be a FOV filler and the TEC would do it justice.

Wikipedia states: "IC 5146 (also Caldwell 19, Sh 2-125, and the Cocoon Nebula) is a reflection[2]/emission[3] 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.[4] It shines at magnitude +10.0[5]/+9.3[3]/+7.2.[6] 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.[2][5] The cluster is about 4,000 ly away, and the central star that lights it formed about 100,000 years ago;[7] the nebula is about 12 arcmins across, which is equivalent to a span of 15 light years.[6]".

Data acquisition: Barry Wilson & Steve Milne
Processing: Barry Wilson



Barry Wilson
License: None (All rights reserved)

Sky plot

Sky plot


IC 5146 The Cocoon nebula, 


            Barry Wilson

In these public groups

Entre Encinas y Estrellas (e-EyE)