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Contains:  IC 443, The star Propus (ηGem)
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IC443 - Jellyfish Nebula, 





    
        

            Nico Carver
IC443 - Jellyfish Nebula

IC443 - Jellyfish Nebula

Technical card

Resolution: 2888x2648

Dates:Feb. 5, 2017Feb. 26, 2017March 16, 2017

Frames:
Astrodon Tru-Balance 1.25" 3nm OIII: 20x300" (gain: 139.00) -20C bin 1x1
Astrodon Tru-Balance 1.25" 5nm Ha: 53x300" (gain: 139.00) -20C bin 1x1

Integration: 6.1 hours

Darks: ~20

Avg. Moon age: 18.88 days

Avg. Moon phase: 50.21%

Bortle Dark-Sky Scale: 8.00

Temperature: 10.00

Astrometry.net job: 1498861

RA center: 94.262 degrees

DEC center: 22.587 degrees

Pixel scale: 1.502 arcsec/pixel

Orientation: 105.501 degrees

Field radius: 0.817 degrees

Locations: Backyard, Newark, Delaware, United States

Data source: Backyard

Comments

Author

2ghouls
Nico Carver
License: None (All rights reserved)
4774
Like

Revisions

  • IC443 - Jellyfish Nebula, 





    
        

            Nico Carver
    Original
  • IC443 - Jellyfish Nebula, 





    
        

            Nico Carver
    B
  • IC443 - Jellyfish Nebula, 





    
        

            Nico Carver
    C
  • Final
    IC443 - Jellyfish Nebula, 





    
        

            Nico Carver
    D

B

First try at combining Ha and OIII data. Used Edoardo Luca Radice's PixInisght variation on the Steve Cannistra method for bicolor composition.

C

More natural looking, different methods used for processing.

D

Added another 1.5 hours of Ha. Tried to keep what was working in version "C", but improve the stars and chrominance noise reduction. Also, noticed some dark ringing around the stars in the bright shell of the jellyfish in version C, which I eliminated in D. Might be done for this winter, but next winter I would like to extend this to μ Gem and make this a 2-panel mosaic. Comments welcome!

Sky plot

Sky plot

Histogram

IC443 - Jellyfish Nebula, 





    
        

            Nico Carver