IC443 and IC444 (Dan Kusz)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: 10 Gem · 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 and IC444

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IC443 and IC444

So this is a combination of data taken last year in February and data taken a year later in February 2023. I was never happy with the original image, I felt I was missing the faint oxygen signal of this nebula. So collected another 7 hours of OIII data and I was finally able to produce the image I was looking for. I also drizzled the data, and will moving forward with the Esprit 80, as I noticed the stars were under sampled and looking square. processing with a 2x drizzle gave me a good 0.94 arcsec/pixel. The downside was much longer processing time and a 99MP image size. However, it does look better with the new sampling, a trade I am willing to make. I also changed this to a portriat orientation as I thought it looked better and different this way, personal preference.

IC 443 (also known as the Jellyfish Nebula and Sharpless 248 is a galactic supernova remnant (SNR) in the constellation Gemini. On the plane of the sky, it is located near the star Eta Geminorum. Its distance is roughly 5,000 light years from Earth.

IC 443 may be the remains of a supernova that occurred 3,000 - 30,000 years ago. The same supernova event likely created the neutron star CXOU J061705.3+222127, the collapsed remnant of the stellar core. IC 443 is one of the best-studied cases of supernova remnants interacting with surrounding molecular clouds.

Thanks for looking,
Dan.

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Status	Advanced success
Started	...
Astrometry.net job	7261678
PixInsight job	MU4RUXCTUTOIVXX1LP5CFZI8I1X8BEYO
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h19m33s.750
RA (top/left)	06h27m49s.842
RA (top/right)	06h23m03s.284
RA (bottom/right)	06h11m16s.297
RA (bottom/left)	06h16m07s.905

Dec (center)	+22°39′06″.89
Dec (top/left)	+22°35′05″.96
Dec (top/right)	+24°23′09″.45
Dec (bottom/right)	+22°41′31″.71
Dec (bottom/left)	+20°54′48″.99

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IC443 and IC444

IC443 and IC444

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IC443 and IC444

IC443 and IC444

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