Sh2-310: Another hidden southern gem (Charles Bracken)

Celestial hemisphere: Southern · Constellation: Canis Major (CMa)

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Sh2-310: Another hidden southern gem

Link: https://wordpress.com/post/digitalstars.wordpress.com/2340

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Sh2-310: Another hidden southern gem

Link: https://wordpress.com/post/digitalstars.wordpress.com/2340

There are only a handful of images of this object here on astrobin, which is surprising given what a nice object this is. It's a fine arch of nebulosity that sits within the larger (huge, actually) Gum 8 nebula. There is some faint reflection nebulosity on the southeastern edge, which appears to be catalogued as GM 1-46, though the designation is unclear. I took 1h 45m of OIII exposures, but no signal was seen, so I did not use those data in this image. This object is listed in two 1955 surveys of HII regions: Colin Gum (where it is part of #8) and Gaze and Shajn (where it is #117). I'm not sure whom to attribute discovery given the papers were published in the same year. Beverly Lynds added it to the LBN catalog as LBN1059. The gas here is believed to be ionized by the stars of NGC2362. Using that cluster as a proxy for distance puts Sh2-310 at about 5000 light years away, but other measurements put the distance as far away as 13,400 light years.

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Astrometry.net job	8834084
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Sh2-310: Another hidden southern gem

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Sh2-310: Another hidden southern gem

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