Sh2-223 Region (Jim Thommes)

Celestial hemisphere: Northern · Constellation: Auriga (Aur) · Contains: 20 Aur · The star ρ Aur

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Sh2-223 Region

Link: http://www.jthommes.com/Astro/Sh2-223.htm

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Sh2-223 Region

Link: http://www.jthommes.com/Astro/Sh2-223.htm

This image shows the emission nebula (HII region) Sh2-223 (also known as LBN 768). Sh2-223 is the brighter portion of nebulosity in this image. The larger circular structure that is associated with Sh2-223 was thought to be a supermova remnant (SNR G166.2+02.5). It was listed in Green's supernova remnant catalog (which he has had several revisions during the past two decades). Between the 2001 and 2009 versions this supernova was dropped from Green's catalog - published work by Foster et. al. showed that this larger structure is only a HII region. This field also shows two open clusters - SAI 47 (aka MWSC 526) and COIN-Gaia 12. These objects and some of the brighter stars are identified in the annotated image.

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