IC443 - Jellyfish Nebula (maxchess)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: 6 BU Gem · 7 eta Gem · Gem A · HD252968 · HD253017 · HD253018 · HD253129 · HD253130 · HD253153 · HD253178 · HD253210 · HD253236 · HD253238 · HD253302 · HD253323 · HD253324 · HD253342 · HD253365 · HD253388 · HD253389 · HD253412 · HD253437 · HD253460 · HD253462 · HD253463 · HD253464 · HD253496 · HD253497 · HD253498 · HD253499 · And 93 more.

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IC443 - Jellyfish Nebula

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IC443 - Jellyfish Nebula

Galactic supernova remnant (SNR) in the constellation Gemini imaged with RASA8

This new revision is my first attempt at Pixel math. My processing steps involved splitting the image into stars(stars) & the starless nebula(neb) using Starnet. After working on the nebula and stars seperately I originally recombined the images with the simple Pixelmath expression stars+neb, which worked but smothered the nebula a bit as it averages the two images and I lost detail. In this version I used the expression iif(stars>0.6, stars, neb).
This only adds the stars, not the star background and is better. How many stars of what brightness can be varied by changing the 0.6. Higher for fewer stars, lower for less. If anyone has more sophisticated versions of this I would be interested.

Original
Final
B

Celestron RASA
GAS Astrophotography Interest Group

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Status	Advanced success
Started	...
Astrometry.net job	5476591
PixInsight job	KXO26G0LAD3CRMSAO5E18VIV2O7SYH64
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h15m43s.10
RA (top/left)	06h19m53s.45
RA (top/right)	06h18m05s.90
RA (bottom/right)	06h11m30s.93
RA (bottom/left)	06h13m22s.25

Dec (center)	+22°30′14″.2
Dec (top/left)	+21°57′39″.1
Dec (top/right)	+23°27′58″.1
Dec (bottom/right)	+23°02′23″.7
Dec (bottom/left)	+21°32′23″.0

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IC443 - Jellyfish Nebula

IC443 - Jellyfish Nebula

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IC443 - Jellyfish Nebula

IC443 - Jellyfish Nebula

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