Hemisphere:  Northern  ·  Constellation: Gemini (Gem)  ·  Contains:  IC 443  ·  IC 444  ·  Part of the constellation Gemini (Gem)  ·  The star Propus (ηGem)  ·  The star μGem
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IC 443 Jellyfish Nebula, 


            Pleiades Astrophotography Team
IC 443 Jellyfish Nebula
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IC 443 Jellyfish Nebula

Technical card

Imaging telescopes or lenses: Sigma 180 mm F2,8 EX APO Macro OS HSM

Imaging cameras: QHYCCD QHY183M

Mounts: Sky-Watcher NEQ6

Software: Pixinsight

Filters: Optolong Ha 36mm 7nm  ·  Optolong OIII 36mm 6.5nm

Dates:Jan. 31, 2020Feb. 1, 2020

Optolong Ha 36mm 7nm: 67x300" -40C bin 1x1
Optolong OIII 36mm 6.5nm: 66x300" -40C bin 1x1

Integration: 11.1 hours

Darks: ~50

Flats: ~15

Avg. Moon age: 6.42 days

Avg. Moon phase: 39.88%

Bortle Dark-Sky Scale: 3.00

Basic astrometry details

Astrometry.net job: 3233803

RA center: 6h 19' 56"

DEC center: +23° 3' 39"

Pixel scale: 5.688 arcsec/pixel

Orientation: 183.119 degrees

Field radius: 1.976 degrees

Resolution: 2022x1472

Data source: Own remote observatory

Remote source: Non-commercial independent facility


The O-III band is too weak and I spent a lot of time to bring out the blue color from O-III band. In fact, I don't know how to process bicolor image clearly. Anyone has some good idea?


Sky plot

Sky plot


IC 443 Jellyfish Nebula, 


            Pleiades Astrophotography Team

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