IC443 Jellyfish Nebula (Narrowband SOO) (Douglas Triggs)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: 10 Gem · 11 Gem · 12 Gem · 13 mu. Gem · 7 eta Gem · 9 Gem · Gem A · IC 443 · IC 444 · LBN 840 · LBN 841 · LBN 844 · LBN 845 · LDN 1564 · LDN 1565 · LDN 1566 · LDN 1567 · Part of the constellation Gemini (Gem) · Sh2-248 · Sh2-249 · Tejat Posterior · Tejat Prior · The star Propus (ηGem) · The star μGem

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IC443 Jellyfish Nebula (Narrowband SOO)

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IC443 Jellyfish Nebula (Narrowband SOO)

I'm happy with this one, but... Holy hell was it a pain to process because there was something wrong with my flats (I'm still trying to figure out exactly what's going on there. Tried using my iPad to do the flats and resulted in weird rings that are clearly not in the lights). And there was no way to take new ones after the recent wind storm blew over my scope and I had to clean out the camera and the filters, so I was stuck with dealing with what I had, and mostly I ended up using old flats with the very poor correction that implies. And as a result, I couldn't do actual SHO like I'd originally planned because the background gradients were a complete mess and it basically ruined the image (and even with my final palette it cost me some faint detail I had to curve out).

So I ended up picking SOO instead (which looked a bit better than HOO). H-ɑ data got included in the luminosity channel, though. I think SOO looks pretty good here, because IC443 is a supernova remnant, and the texture of it is a lot like the Veil. Even the color, a bit. It just works.

I also took true color images for the stars, but ended up not using any of the color data, just the luminosity, since that looked better. I also didn't get quite as much data as I'd hoped to get thanks to wind, fire (well, smoke), and snow... But that didn't hurt too much, I think.

This is also the first series I did with the Eagle 4 and N.I.N.A. I'm very, very pleased with that combination so far.

ZWO ASI2600MM Pro
Imaged with N.I.N.A.
William Optics Fluorostar Series

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Status	Advanced success
Started	...
Astrometry.net job	5357279
PixInsight job	KIQBRDGI3QLG5FZEGGCOMEFIQDU7PS3L
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h19m21s.39
RA (top/left)	06h25m54s.94
RA (top/right)	06h12m52s.83
RA (bottom/right)	06h12m54s.39
RA (bottom/left)	06h25m43s.85

Dec (center)	+22°52′27″.1
Dec (top/left)	+23°50′37″.4
Dec (top/right)	+23°52′20″.8
Dec (bottom/right)	+21°53′06″.3
Dec (bottom/left)	+21°51′20″.6

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IC443 Jellyfish Nebula (Narrowband SOO)

IC443 Jellyfish Nebula (Narrowband SOO)

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IC443 Jellyfish Nebula (Narrowband SOO)

IC443 Jellyfish Nebula (Narrowband SOO)

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