IC443 (Jellyfish Nebula) - Jan 2018 (Geof Lewis)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: 10 Gem · 11 Gem · 12 Gem · 7 eta Gem · 9 Gem · IC 443 · Sh2-248 · Tejat Prior · The star Propus (ηGem)

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IC443 (Jellyfish Nebula) - Jan 2018

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IC443 (Jellyfish Nebula) - Jan 2018

Boy was this one hard to get, right from data capture through the very many processing attempts...!!

It's a version of LHaRGB where I combined the Ha with R then added together with GB to produce a colour image, then layered the Ha again as a luminence, as so far I haven't been able to shoot any luminence.

I had issues with autofocus during capture, trying to use offsets in SGP, but learnt the hard way that backlash in the TSAPO focuser meant that the final focus adjustment was off, so that was a few nights work down the drain. Wind, passing cloud and generally poor seeing played their part on the few other clearish nights the past month, so even passable RGB data was hard to get. I did manage 3 hours of Ha data of which 2.5 hous was usable, but that is probably insufficient for this target.

Nebulae

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Status	Advanced success
Started	...
Astrometry.net job	1905456
PixInsight job	1HWKACRRHSJ3OMHRSL1316RKK61WFJTX
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	06h17m20s.72
RA (top/left)	06h19m48s.46
RA (top/right)	06h20m29s.97
RA (bottom/right)	06h14m50s.94
RA (bottom/left)	06h14m13s.79

Dec (center)	+22°56′02″.6
Dec (top/left)	+22°00′27″.4
Dec (top/right)	+23°44′42″.2
Dec (bottom/right)	+23°51′29″.8
Dec (bottom/left)	+22°07′09″.6

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IC443 (Jellyfish Nebula) - Jan 2018

IC443 (Jellyfish Nebula) - Jan 2018

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IC443 (Jellyfish Nebula) - Jan 2018

IC443 (Jellyfish Nebula) - Jan 2018

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