Sh2-221 & Sh2-216 (mhtandy)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: Auriga · B15 · B16 · B17 · B25 · HD28082 · HD28280 · HD28353 · HD28416 · HD28772 · HD29093 · HD29180 · HD29203 · HD29526 · HD29580 · HD29818 · HD29827 · HD29882 · HD29997 · HD30178 · HD30221 · HD30409 · HD30557 · HD30570 · HD30584 · HD30597 · HD30649 · HD30736 · HD30987 · HD31016 · And 36 more.

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Sh2-221 & Sh2-216

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Sh2-221 & Sh2-216

This is a widefield image near the edge of the constellation Auriga, featuring two very faint objects, Sh2-221 and Sh2-216:

- Sh2-221 (left) is the remnant of an ancient supernova explosion, about 2600 light-years from Earth.
- Sh2-216 (right), about 400 light-years away, is the 2nd-closest planetary nebula from Earth (closest is the Helix Nebula).

Both objects are very large in size as seen from Earth, about as wide as 3 full moons. It's interesting to see two different processes of star death, side by side.

These objects are very faint and were a beast to process. I didn't see much of a difference between 4 and 8 hours of integration - I'd like to add to this data over time to get a better image. Some other time though - I need to take a break from this one!

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Description: Cropped to highlight Sh2-216

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
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Status	Advanced success
Started	...
Astrometry.net job	8871258
PixInsight job	0ZGNPFQ17ID5KRN4BE86C9IVHPDHLTDN
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	04h49m12s.87
RA (top/left)	05h12m17s.79
RA (top/right)	04h26m56s.77
RA (bottom/right)	04h28m01s.27
RA (bottom/left)	05h09m20s.97

Dec (center)	+46°40′15″.7
Dec (top/left)	+48°56′26″.6
Dec (top/right)	+49°12′01″.8
Dec (bottom/right)	+44°07′09″.5
Dec (bottom/left)	+43°53′54″.8

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Sh2-221 & Sh2-216

Sh2-221 & Sh2-216

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Sh2-221 & Sh2-216

Sh2-221 & Sh2-216

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