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IC443, The Jellyfish Nebula, 


            Steven Bellavia

IC443, The Jellyfish Nebula

Technical card

Imaging telescopes or lenses: TS-Optics PHOTOLINE 72mm f/6  ·  Borg 90FL

Mounts: Sky-Watcher EQ-6R Pro SynScan

Guiding telescopes or lenses: The Bellavia Basic-II 50mm f/7.5 guidescope  ·  Agena Astro 50mm f/3.9 Guidescope

Guiding cameras: ZWO ASI 290MC  ·  ASI224MC

Focal reducers: Starizona Apex ED S 0.65x Reducer/Flattener  ·  Borg 0.72X Quadruplet Super Reducer, #7872

Software: Pleiades Astrophoto PixInsight  ·  IDEIKI AstroPhotography Tool (APT)  ·  Digital Photo Professional  ·  Annie's Astro Actions V7  ·  SharpCap Pro 3.2  ·  PHD2 Guiding

Filters: Astronomik 6nm OIII  ·  Astronomik 6nm Ha  ·  R  ·  B  ·  Optolong 7nm Ha 2"

Dates:Jan. 22, 2020Feb. 8, 2021

Astronomik 6nm Ha: 15x240" (gain: 111.00) -15C bin 1x1
Astronomik 6nm OIII: 22x300" (gain: 100.00) -15C bin 1x1
Optolong 7nm Ha 2": 25x300" (gain: 100.00) -15C bin 1x1
B: 30x30" (gain: 111.00) -15C bin 1x1
G: 30x30" (gain: 111.00) -15C bin 1x1
R: 30x30" (gain: 111.00) -15C bin 1x1

Integration: 5.7 hours

Darks: ~30

Flats: ~30

Flat darks: ~30

Avg. Moon age: 26.69 days

Avg. Moon phase: 9.15%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 20.27

Mean FWHM: 4.00

Temperature: -8.33

Basic astrometry details job: 4222181

Resolution: 5357x3571

Data source: Backyard


The Jellyfish Nebula, IC443, Sh2-248, is a supernova remnant, 5,000 light years from Earth. It is between two stars Propus and Tejat, in the left foot of the left twin of Gemini.



  • IC443, The Jellyfish Nebula, 


            Steven Bellavia
  • IC443, The Jellyfish Nebula, 


            Steven Bellavia
  • Final
    IC443, The Jellyfish Nebula, 


            Steven Bellavia

Sky plot

Sky plot


IC443, The Jellyfish Nebula, 


            Steven Bellavia