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


            Angelo F. Gambino
IC 443
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IC 443

Technical card

Imaging telescopes or lenses: Orion 80ED Refractor APO

Imaging cameras: ASI 1600MM Cool

Mounts: Skywatcher HEQ5 Pro

Guiding telescopes or lenses: Orion 50mm Guidescope

Guiding cameras: ZWO ASI 120 MC Color

Focal reducers: Skywatcher 0.85x Reducer & Flattener

Software: KStars Ekos/INDI  ·  Pleiades Astrophoto PixInsight 1.8 Ripely

Filters: ZWO H-alpha 7nm

Accessory: ZWO EFW 1,25" Mini Filters Wheel

Dates:April 11, 2020April 15, 2020

ZWO Hɑ 1.25" 7nm: 21x300" (gain: 300.00) -20C bin 3x3
ZWO OIII 1.25" 7nm: 18x300" (gain: 300.00) -20C bin 3x3

Integration: 3.2 hours

Darks: ~40

Flats: ~40

Flat darks: ~40

Bias: ~100

Avg. Moon age: 20.64 days

Avg. Moon phase: 64.34%

Bortle Dark-Sky Scale: 9.00

Basic astrometry details

Astrometry.net job: 3421018

RA center: 6h 17' 36"

DEC center: +22° 38' 24"

Pixel scale: 2.255 arcsec/pixel

Orientation: 334.676 degrees

Field radius: 1.108 degrees

Resolution: 2894x2033

Data source: Backyard


The Jellyfish Nebula (IC 443) taken from the highly light polluted city of Palermo (Italy) in the Hydrogen H-alpha and OIII narrow band (7nm each).

20 frames of 300 s each taken with an Orion ED80 refractor telescope, and the CMOS sensor of the ZWO ASI 1600 MM camera cooled at -20°C .



  • IC 443, 


            Angelo F. Gambino
  • Final
    IC 443, 


            Angelo F. Gambino


Description: HOO bicolor palette

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Sky plot

Sky plot


IC 443, 


            Angelo F. Gambino