IC443 Jellyfish Nebula (Narrowband SH/OO + True Color Stars) (Douglas Triggs)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: 11 Gem · 12 Gem · 13 Gem) · 13 mu. Gem · 7 Gem) · 7 eta Gem · Calx (μ 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) · Praepes (η Gem · Sh2-248 · Sh2-249 · Tejat Posterior · Tejat Prior · The star 12 Gem · The star Propus · The star Tejat

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IC443 Jellyfish Nebula (Narrowband SH/OO + True Color Stars)

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IC443 Jellyfish Nebula (Narrowband SH/OO + True Color Stars)

This isn't SHO, or bi-color SOO, it's kind of in-between (the G channel is blended H/O). To my eye the SHO version is a little too "electric" (it's not terrible, but this is better, I think). And this still has more dynamic color than a true bi-color would. True color stars composited back in, as per my standard process.

Supernova remnants are kind of challenging to get the color balance right on (I'm... Mostly happy, I guess?); in the end this isn't that different than processing the Veil, I think, both work well with similar palettes.

At any rate, this is another repeat December object, but unlike the other repeats, I had a lot of trouble with getting something decent last time, so I have no regrets this time (my telescope got busted between when I took the lights and the flats, and I had a hell of time even getting anything decent out of that mess. This data is absolutely better). But it did take forever to finish with our lousy winter weather, and I decided now that our typical crappy spring weather has started to kick in, it wasn't worth waiting for a lousy two more frames per my original plan (that probably would have taken three weeks to get... It's long past time to tear down my rig and switch scopes for galaxy season).

I don't know what's going on with the one star on the edge; some tilt in due to the OAG, maybe?

Also like to know what that really obvious planetary is in the top (left-ish) of the frame is. [ETA: apparently it's HoCr 1/PNG 188.6+04.4, discovered in 2016.]

Final
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B

B

Description: Straight-up SHO for comparison

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Status	Advanced success
Started	...
Astrometry.net job	7399533
PixInsight job	X7D68VBYR9TSJCOQMYTO7CEPXSLLRU7I
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h19m31s.60
RA (top/left)	06h24m03s.68
RA (top/right)	06h13m48s.16
RA (bottom/right)	06h15m02s.44
RA (bottom/left)	06h25m11s.40

Dec (center)	+22°45′28″.3
Dec (top/left)	+23°44′19″.1
Dec (top/right)	+23°19′26″.5
Dec (bottom/right)	+21°46′09″.2
Dec (bottom/left)	+22°10′47″.1

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IC443 Jellyfish Nebula (Narrowband SH/OO + True Color Stars)

IC443 Jellyfish Nebula (Narrowband SH/OO + True Color Stars)

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IC443 Jellyfish Nebula (Narrowband SH/OO + True Color Stars)

IC443 Jellyfish Nebula (Narrowband SH/OO + True Color Stars)

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