New Image: Supernova Remnant G160.8+02.6 (Sh2-221)

[jthommes]

This seldom imaged Supernova is the main attraction in this two panel mosaic image. It is at a relatively close distance (compared to other SNR's) of about 1,760 light years. It is also known as HDH 9 and Sh2-221. It is a difficult acquisition in that it is dim - and to make matters more challenging is the very bright star Capella just off the left edge of this image.

Sh2-219 is an emission nebula just above the upper right rim of the SNR. Sh2-219's distance is much further - estimates range from 12,700 to 13,700 light years. In the lower right is a complex consisting of LBN 755, Barnard 25, and LDN 1465. Surprisingly, there are some background galaxies in this field as well - they are only visible in the full size image and annotated image.

The image below is a wide crop from the full field - it links to the main page with image and information. There is also a link below to the full FOV and annotated image. The full resolution image has a horizontal FOV of 3.11 degrees and an image scale of about 1.87 arcsec/pixel.

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  SNR G160.8+02.6 (Sh2-221)

Full FOV image (Pan and Zoom):
SNR G160.8+02.6 (Sh2-221)

Annotated Image (Pan and Zoom):
SNR G160.8+02.6 (Sh2-221) Annotated

Images also available on astrobin -SNR G160.8+02.6 (Sh2-221)

Scope: FSQ-106N at f/5
Camera: ASI2600MM (Astronomik type 2c Ha, OIII, RGB filters)
Location: DAA Observatory, Shelter Valley, CA

[AstroBee]

Amazing image, Jim.
Is this old data? Between the atmospheric rivers and winds, I haven't been able to get much done in Vegas.

[MariusD69]

Very impressive! Great work, Jim! This is the first time I see an image of this target.

[StarHugger]

Super nice imaging Jim and thank you for the extra viewing options...

The termination shock detail on the left side of the nova does look like something is ionizing or affecting it in some way.

The details there are very complex.

[messier 111]

fabulous image , thx .

[hosshead]

Remarkably beautiful!
Thanks for the view!

[jthommes]

Amazing image, Jim.
Is this old data? Between the atmospheric rivers and winds, I haven't been able to get much done in Vegas.

Thanks Greg. Yes, this is data taken over several sessions in November and December 2023. This is the first processing of this data. Here in San Diego East County deserts, the weather has been spotty. I managed a few nights in January and February. I'll be luck if I get one session in March.

Very impressive! Great work, Jim! This is the first time I see an image of this target.

Thanks Marius! Yes, this SNR is fairly infrequently imaged. In most of these few other images the target is referenced as Sh2-221.

Super nice imaging Jim and thank you for the extra viewing options...

The termination shock detail on the left side of the nova does look like something is ionizing or affecting it in some way.

The details there are very complex.

Thanks for your comment - much appreciated! I am glad you liked the different visualizations I made.

I think the whole rim is the expanding supernova - from what info I have seen on this object, the core star (neutron star or black hole) has not been discovered yet. The little Sh2-219 HII nebula just above Sh2-221 does have an ionizing star - you can see it somewhat central in this tiny nova in the full size image.

fabulous image , thx .

Thanks for your comment Jean-Yves!

Remarkably beautiful!
Thanks for the view!

Thanks for your comment - much appreciated!