Sh 2-221 and Sh 2-216 Three Deaths and a Birth (psparkman)

Celestial hemisphere: Northern · Constellation: Auriga (Aur) · Contains: B25 · HD29093 · HD29203 · HD29526 · HD29818 · HD29827 · HD29900 · HD29997 · HD30178 · HD30221 · HD30557 · HD30570 · HD30597 · HD30649 · HD30736 · HD31016 · HD31195 · HD31705 · HD31844 · HD31855 · HD31991 · HD32050 · HD32233 · HD32296 · HD32358 · LBN 737 · LBN 742 · LBN 744 · LBN 745 · LBN 747 · And 10 more.

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Sh 2-221 and Sh 2-216 Three Deaths and a Birth

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Sh 2-221 and Sh 2-216 Three Deaths and a Birth

I remember the first time that I saw an image of this area. I was very intrigued by the juxtaposition of a Super Nova Remnant (SNR) vs a Planetary Nebula (PN). I imaged it last year, but that was from my suburban skies and I didn't have the reducer so it required a mosaic as well as mostly narrowband. Now with the scope in a dark skies observatory, and having a reducer, I wanted to revisit it and try to improve on what I had already done.

I like that I now captured some of the ISM that lies between here and the SNR Sh 2-221 on the left, as it adds some depth. While these two objects appear similar in size in this image, they are actually much different in size. Sh 2-221 (SNR) is approximately 2,600 light years distant, while the Planetary Nebula (Sh 2-216) is approximately 390 Light years away. In addition, there is a small planetary nebula PN G156.4+01.1 in the upper right. There are also several star formation areas. The bright nebula in the upper left is Sh 2-217 which contains 4,000 solar masses of material and is in the same complex as Sh 2-219 just below it, and both are active star formation areas.

The birth, life, and death of different size stars is so interesting, and I like that this image shows some of those processes contrasted with each other.

This image is a combination of SHO and RGB. I used the new NBColourMapper script and Adam Blocks Continuum Subtraction method to add the SHO to the RGB in a more natural color palette.

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Status	Advanced success
Started	...
Astrometry.net job	8858456
PixInsight job	USHZTJZ5NVN7Y09HBUOSKCMJ8QRC86EX
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	04h51m39s.85
RA (top/left)	05h09m20s.68
RA (top/right)	04h37m26s.70
RA (bottom/right)	04h34m47s.50
RA (bottom/left)	05h04m46s.61

Dec (center)	+46°55′11″.4
Dec (top/left)	+48°08′01″.7
Dec (top/right)	+49°05′21″.2
Dec (bottom/right)	+45°33′13″.4
Dec (bottom/left)	+44°38′52″.2

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Sh 2-221 and Sh 2-216 Three Deaths and a Birth

Sh 2-221 and Sh 2-216 Three Deaths and a Birth

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Sh 2-221 and Sh 2-216 Three Deaths and a Birth

Sh 2-221 and Sh 2-216 Three Deaths and a Birth

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