Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  B168  ·  Cocoon Nebula  ·  Cocoon nebula  ·  IC 5146  ·  IC5146  ·  Sh2-125  ·  VdB147
Getting plate-solving status, please wait...
Cocoon Nebula / IC 5146, 



    
        

            Andrew Barton
Powered byPixInsight

Cocoon Nebula / IC 5146

Getting plate-solving status, please wait...
Cocoon Nebula / IC 5146, 



    
        

            Andrew Barton
Powered byPixInsight

Cocoon Nebula / IC 5146

Imaging telescopes or lenses: Stellarvue SVX 130T

Imaging cameras: ZWO ASI 1600MM Pro

Mounts: AstroPhysics Mach1 GTO

Guiding telescopes or lenses: Orion Short Tube 80

Guiding cameras: Lodestar

Software: PixInsight  ·  Main Sequence Software Sequence Generator Pro  ·  Open PHD Guiding PHD2 Guiding 2.6.2

Filters: Astrodon GREEN 31mm - Gen2 E-Series Tru-Balance  ·  Astrodon BLUE 31mm - Gen2 E-Series Tru-Balance  ·  Astrodon RED 31mm - Gen2 E-Series Tru-Balance  ·  Astrodon Tru-Balance 1.25" 5nm HA

Accessory: MoonLite NiteCrawler WR35  ·  Alnitak Flip-Flat  ·  Starlight Xpress filter-wheel 7x1,25"


Dates:Sept. 4, 2020Sept. 15, 2020Sept. 16, 2020

Frames:
Astrodon BLUE 31mm - Gen2 E-Series Tru-Balance: 94x120" (3h 8') (gain: 75.00) -10C bin 1x1
Astrodon GREEN 31mm - Gen2 E-Series Tru-Balance: 92x120" (3h 4') (gain: 75.00) -10C bin 1x1
Astrodon RED 31mm - Gen2 E-Series Tru-Balance: 101x120" (3h 22') (gain: 75.00) -10C bin 1x1
Astrodon Tru-Balance 1.25" 5nm HA: 121x360" (12h 6') (gain: 139.00) -5C bin 1x1

Integration: 21h 40'

Avg. Moon age: 24.20 days

Avg. Moon phase: 34.00%


Astrometry.net job: 3903857

RA center: 21h 53' 28"

DEC center: +47° 16' 1"

Pixel scale: 0.848 arcsec/pixel

Orientation: 50.222 degrees

Field radius: 0.559 degrees


Resolution: 3668x3012

Locations: Backyard, Tucson, Arizona, United States

Data source: Backyard

Description

Imaging the last couple of months has been very difficult. Our summer was usually warm and cloudy without the relief of cooling monsoon rains. Just as the skies started to clear we were assaulted by smoke from the California wild fires. On any given night it is very difficult to predict when smoke will be reducing transparency. Under these conditions, just getting data is an achievement.

I started this session with Ha as the moon was pretty bright when skies cleared enough to image. I wasn't sure what contribution Ha would make to this subject, but it was something I could play with. Conditions then worsened but cleared up just after the new moon. I got most of my RGB data on 9-15. I took more data on 9-16 but S/N rapidly dropped off during this session due to the return of wildfire smoke. So much of this data was rejected.

I ended up using the Ha to enhance the synthetic luminance image. It contributed some detail to the nebula but wasn't essential. I used a PixInsight screen blend at 20% with the Ha data. In the end I am pretty happy how it came out. I haven't imaged the Cocoon in many years. I think of it as comfort food for astrophotography. We could all use little bit of that right now.

Comments

Revisions

  • Final
    Cocoon Nebula / IC 5146, 



    
        

            Andrew Barton
    Original
  • Cocoon Nebula / IC 5146, 



    
        

            Andrew Barton
    B

B

Description: My original framing before cropping.

Uploaded: ...

Sky plot

Sky plot

Histogram

Cocoon Nebula / IC 5146, 



    
        

            Andrew Barton