Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  Cocoon nebula, IC 5146
Getting plate-solving status, please wait...
IC 5146 The Cocoon Nebula, 





    
        

            Göran Nilsson
IC 5146 The Cocoon Nebula

IC 5146 The Cocoon Nebula

Technical card

Resolution: 3883x2693

Dates:Sept. 13, 2018

Frames: 81x300"

Integration: 6.8 hours

Avg. Moon age: 4.06 days

Avg. Moon phase: 17.52%

Astrometry.net job: 2263921

RA center: 327.959 degrees

DEC center: 47.275 degrees

Pixel scale: 1.261 arcsec/pixel

Orientation: 351.079 degrees

Field radius: 0.828 degrees

Locations: Home Observatory, Hole, Värmland, Sweden

Data source: Backyard

Description

The Cocoon Nebula is in the constellation of Cygnus (the Swan) and is about about 4,000 ly away, and the central star that lights it formed about 100,000 years ago. The nebula span about 15 light years. The dark nebula Barnard 168 (B168) forms a dusty lane that surrounds the Cocoon Nebula and projects westward forming the appearance of a trail.

This is my third target using my new ASI071. The object was near zenith, no visible clouds or moon, and a nice Milky Way accross the sky. My SQM showed 21.1. Even guiding was good (0.5"RMS). But, for some reason I ended up the a very strong green tint on all the subs. After much tweaking with colour curves and other colour adjustments in PS I finally reached a presentable image but it was a heck of a job and I initially gave up for a while.

Thanks to friends at SGL, the green tint mystery was solved. For some reason the camera software had set white balance to 0, so since most of the signal is collected by the green pixels in the bayer mask it becomes green. I am now back to the default (99/60) setting for white balance. Good thing is that no data was lost and it did not affect the final outcome of the image.

Comments

Author

gorann
Göran Nilsson
License: None (All rights reserved)
1400
Like

Revisions

  • IC 5146 The Cocoon Nebula, 





    
        

            Göran Nilsson
    Original
  • IC 5146 The Cocoon Nebula, 





    
        

            Göran Nilsson
    B
  • IC 5146 The Cocoon Nebula, 





    
        

            Göran Nilsson
    C
  • IC 5146 The Cocoon Nebula, 





    
        

            Göran Nilsson
    D
  • IC 5146 The Cocoon Nebula, 





    
        

            Göran Nilsson
    E
  • Final
    IC 5146 The Cocoon Nebula, 





    
        

            Göran Nilsson
    F

E

After not having looked at it for a while it struck me as quite dark so here is a brighter version with a bit more saturation to the sky

F

Even brighter

Sky plot

Sky plot

Histogram

IC 5146 The Cocoon Nebula, 





    
        

            Göran Nilsson