Hemisphere:  Northern  ·  Constellation: Gemini (Gem)  ·  Contains:  IC 443  ·  The star Propus (ηGem)
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Jellyfish Nebula IC443, 



    
        

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Jellyfish Nebula IC443
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Jellyfish Nebula IC443

Getting plate-solving status, please wait...
Jellyfish Nebula IC443, 



    
        

            hy
Jellyfish Nebula IC443
Powered byPixInsight

Jellyfish Nebula IC443

Acquisition details

Dates:
Feb. 24, 2020
Frames:
Astronomik Blue 31mm: 44×240(2h 56′) (gain: 75.00) -20°C bin 1×1
Astronomik Green 31mm: 33×240(2h 12′) (gain: 75.00) -20°C bin 1×1
Astronomik Ha 31mm 6nm: 28×480(3h 44′) (gain: 139.00) -20°C bin 1×1
Astronomik Red 31mm: 40×240(2h 40′) (gain: 75.00) -20°C bin 1×1
Integration:
11h 32′
Darks:
25
Flats:
25
Bias:
100
Avg. Moon age:
0.78 days
Avg. Moon phase:
0.68%
Bortle Dark-Sky Scale:
5.00

Basic astrometry details

Astrometry.net job: 3296036

RA center: 06h17m21s.1

DEC center: +22°3354

Pixel scale: 1.325 arcsec/pixel

Orientation: 188.506 degrees

Field radius: 0.870 degrees

Resolution: 3781x2836

File size: 14.1 MB

Data source: Backyard

Description

Here's an image of the Jellyfish Nebula (IC 443) taken Feb 24-26.

It's HaRGB with (after blinking) Blue [email protected]=2.9h, Green [email protected]=2.2h, Red [email protected]=2.7h & Ha [email protected]=3.7h. Total 11.5 hours of exposure from my house in Ladera (f/5.6105mm WO refractor, ZWO ASI1600mm pro camera @-20C, Atlas Pro mount).

Combination of PixInsight for the basic RGB and Ha processing, then layers in Photoshop to combine the RGB and HA and various contrast adjustments. I merged in a 2nd less-stretched and somewhat desaturated RGB image at the position of Propus, the bright star (Mag 3.3) to the left of the nebula.

The nebula, a supernova remnant, has a nice write-up at https://www.nasa.gov/mission_pages/chandra/what-spawned-the-jellyfish-nebula.html

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Revisions

  • Jellyfish Nebula IC443, 



    
        

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    Original
  • Final
    Jellyfish Nebula IC443, 



    
        

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    B

B

Description: Added deconvolution, and modified the Ha mixing to produce less background red.

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Sky plot

Sky plot

Histogram

Jellyfish Nebula IC443, 



    
        

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