Miracle Jellyfish (IC 443) (Gary Lopez)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: 12 Gem · 7 eta Gem · IC 443 · IC 444 · Sh2-248 · Sh2-249 · Tejat Prior · The star Propus (ηGem)

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Miracle Jellyfish (IC 443)

Link: https://www.garylopezphotography.com

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Miracle Jellyfish (IC 443)

Link: https://www.garylopezphotography.com

The data for this image were one of the gifts I received last Christmas. In December there was a three-day stretch of clear weather. Because of equipment malfunctions, I was only able to collect about 9 hours of light sub, not nearly enough for this object. About a week later there was one more clear night and this time everything worked. I enjoyed perfect tracking and focus from horizon to horizon and found 9 more hours of spectacular data on my computer the next morning. It was a bit of a holiday miracle.

This is the third time that I have processed these data. In the previous efforts, I struggled with a perimeter glow, especially in the SII data, and found that I was over processing and loosing object structure. Since those two earlier attempts, I have experimented and finally devised a processing approach that does a reasonable job of cleaning up the perimeter glow without any obvious impact on the signal.

Suburban Astrophotography
SF Bay Area Imagers
ZWO ASI1600MM/QHY163M

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Status	Advanced success
Started	...
PixInsight job	WB59R11KWISM05O9DFRRNJK11ETVMSXO
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	06h18m12s.33
RA (top/left)	06h21m14s.69
RA (top/right)	06h13m47s.87
RA (bottom/right)	06h15m11s.80
RA (bottom/left)	06h22m34s.61

Dec (center)	+22°40′12″.5
Dec (top/left)	+23°31′26″.4
Dec (top/right)	+23°06′13″.2
Dec (bottom/right)	+21°49′03″.3
Dec (bottom/left)	+22°13′45″.2

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Miracle Jellyfish (IC 443)

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