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Hemisphere:  Northern  ·  Contains:  Cocoon nebula, IC 5146
Getting plate-solving status, please wait...
Cocoon Nebula, 


            Tony Cook
Cocoon Nebula
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Cocoon Nebula

Technical card

Imaging telescopes or lenses: ASA N10 astrograph

Imaging cameras: canon 450D

Mounts: 10 Micron 1000 HPS

Focal reducers: ASA 3" Wynne Corrector 0.95x

Software: Russle Croman GradientXTerminator  ·  Noel Carbonni Astrotools  ·  Mike Unsold Images Plus  ·  Photoshop CS 2

Dates:Sept. 15, 2015

Frames: 70x240" ISO800

Integration: 4.7 hours

Darks: ~85

Flats: ~54

Flat darks: ~50

Avg. Moon age: 1.98 days

Avg. Moon phase: 4.37%

Basic astrometry details job: 795105

RA center: 21h 53' 22"

DEC center: +47° 16' 48"

Orientation: 93.346 degrees

Field radius: 0.782 degrees

Resolution: 3938x2622

Locations: Dark Sky Site, Kirby Malzeard, North Yorkshire, United Kingdom


Cocoon Nebula - IC 5146

Another ASA astrograph training image - issues are focus change with temp and dewing on primary, secondary and Wynne corrector.

Version B: Additional local contrast enhancement and Adaptive Richardson-Lucy sharpening (10 iterations) plus a shade more colour saturation.

Version C: Added further Adaptive Richardson-Lucy sharpening (5 iterations) to the star field to combat poor seeing



Tony Cook
License: Attribution-NonCommercial-NoDerivs Creative Commons


  • Cocoon Nebula, 


            Tony Cook
  • Final
    Cocoon Nebula, 


            Tony Cook

Sky plot

Sky plot


Cocoon Nebula, 


            Tony Cook

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