Sh2-221, Sh2-219, and Sh2-217 (Greg Erianne)

Celestial hemisphere: Northern · Constellation: Auriga (Aur) · Contains: LBN 745 · LBN 747 · LBN 759 · Sh2-217 · Sh2-219 · Sh2-221

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Sh2-221, Sh2-219, and Sh2-217

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Sh2-221, Sh2-219, and Sh2-217

This image contains three Sharpless objects, Sh2-221, Sh2-219, and Sh2-217, all three of which are at the southwest corner of the constellation Auriga, near Capella.

The main (and largest) object in the image is SH2-221, a supernova remnant (SNR) that is about 2,600 light years away and designated as SNR G160.9+02.6 (or SNR G160.8+02.6 depending on the source). Sh2-221 extends out of the bottom of the frame since it is too large to fit in a single frame at this focal length (512 mm; FOV 2.6 deg x 1.7 deg).

The other two nebulae, Sh2-219 (LBN 747) and Sh2-217 (LBN 745) can be seen on the right side of the image, Sh2-217 at the right side of the image being the larger of the two. Both Sh2-219 and Sh2-217 are energized by stars at their centers and are approximately 13,000 and 17.000 light years away, respectively.

The entire area probably has quite a bit more surrounding HII and OIII than what I was able to show here, but I wanted to try and capture some of the structure of the two smaller nebulae and couldn’t accomplish both given the limited time I had on the target.

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	Distinct awarded users	Total awarded images
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This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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Other
Unknown

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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
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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Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	9400290
PixInsight job	W43U1N7EBOLAHWHBO78XAI2EPMS4VJAU
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h00m38s.30
RA (top/left)	05h07m26s.76
RA (top/right)	05h03m05s.36
RA (bottom/right)	04h53m35s.90
RA (bottom/left)	04h58m18s.64

Dec (center)	+47°07′23″.9
Dec (top/left)	+46°11′20″.8
Dec (top/right)	+48°33′42″.1
Dec (bottom/right)	+48°01′52″.8
Dec (bottom/left)	+45°40′58″.0

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Sh2-221, Sh2-219, and Sh2-217

Sh2-221, Sh2-219, and Sh2-217

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Image Index:

Contribution Index (beta):

Sh2-221, Sh2-219, and Sh2-217

Sh2-221, Sh2-219, and Sh2-217

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