IC 443, Jellyfish Nebula (Rob Foster)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: 10 Gem · 11 Gem · 12 Gem · 13.60 · 259 Aletheia · 7 Gem) · 7 eta Gem · Gem A · HD253779 · HD253800 · HD253821 · HD253851 · HD253872 · HD253912 · HD253913 · HD253937 · HD253953 · HD253955 · HD253980 · HD254043 · HD254044 · HD254072 · HD254122 · HD254153 · HD254154 · HD254171 · HD254202 · HD254203 · HD254232 · HD254265 · And 82 more.

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IC 443, Jellyfish Nebula

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IC 443, Jellyfish Nebula

This was difficult to process largely because of the large halo around Tejat Prior, or 7 eta gem, on the far right side of the image. I went back to the starless image (after StarXTerminator) and used Clone Stamp to attenuate the globe of orange that carried into the starless image, which helped a bit. Once again, the processing of the undrizzled image was easier and (in my hands) better that the drizzled image. I am dithering every 3 frames, and using default drizzle settings (Scale 2, 0.9, square) but am starting to think about skipping the DI as part of the standard workflow. Besides, in the end, with Bill Blanshan's outstanding star reduction formulas, I am not sure the benefits of the drizzle are noticeable in the final images.

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Status	Advanced success
Started	...
Astrometry.net job	6620023
PixInsight job	MC1PU37IXVATRYNGSUP4F42L6UN40462
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h17m39s.12
RA (top/left)	06h20m35s.69
RA (top/right)	06h14m35s.89
RA (bottom/right)	06h14m44s.21
RA (bottom/left)	06h20m40s.23

Dec (center)	+22°50′09″.9
Dec (top/left)	+23°41′29″.8
Dec (top/right)	+23°40′20″.3
Dec (bottom/right)	+21°58′26″.2
Dec (bottom/left)	+21°59′37″.9

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IC 443, Jellyfish Nebula

IC 443, Jellyfish Nebula

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IC 443, Jellyfish Nebula

IC 443, Jellyfish Nebula

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