IC 443 Jellyfish Nebula in Gemini (JohnAdastra)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: 12 Gem · 6 BU Gem · 7 eta Gem · 8 Gem · 9 Gem · Gem A · IC 443 · IC 444 · Sh2-248 · Tejat Prior · The star Propus (ηGem)

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IC 443 Jellyfish Nebula in Gemini

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IC 443 Jellyfish Nebula in Gemini

The Jellyfish Nebula

My first attempt with this large nebula proved to be an unexpected challenge. The low surface brightness makes the fine details a bit more difficult to tease out of light polluted skies versus other brighter narrowband objects. Also a largely full moon created strong gradients that needed to be reduced through a combination of Dynamic Background Extraction after application of a Starnet nebula mask. Darker skies and much longer integration times may be necessary to do this target true justice. Also I was surprised to find the emission in OIII was virtually non-existent, and the object probably could have been acquired using only Ha and SII data.

Suburban Astrophotography
PixInsight Addicts
Light Polluted skies
LVAAS Astroimaging
ZWO ASI1600MM/QHY163M

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Status	Advanced success
Started	...
Astrometry.net job	4063141
PixInsight job	PAG4SXZ5J5MHWZX9MSWIIH6RWLD2F6OM
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	06h17m09s.15
RA (top/left)	06h10m46s.59
RA (top/right)	06h17m25s.30
RA (bottom/right)	06h23m30s.12
RA (bottom/left)	06h16m52s.90

Dec (center)	+22°33′15″.3
Dec (top/left)	+22°56′30″.7
Dec (top/right)	+21°01′59″.9
Dec (bottom/right)	+22°08′59″.1
Dec (bottom/left)	+24°04′25″.7

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IC 443 Jellyfish Nebula in Gemini

IC 443 Jellyfish Nebula in Gemini

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IC 443 Jellyfish Nebula in Gemini

IC 443 Jellyfish Nebula in Gemini

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