A Quick Sharpless

I’m about to leave for a star party, but had to stay up late last night to finish capturing this target, and then felt compelled to do at least a quick processing to share it with you.

Continuing last year’s exploration of the Sharpless Catalog, this is Sh2-112 in the constellation Cygnus.  The main (brighter) part of this nebula is a bit small for my telescope & camera, but there is a good deal of dimmer nebulosity around it, especially on the right side in this view.  And this dimmer nebulosity seems to contain all 3 of the emission lines I shoot; hydrogen, oxygen, and sulfur, thus providing some color variation.

This is 4 hours of H-alpha (used as luminence), and 2.5 hours each of O-III and S-II, all using 30 minute sub-exposures.  I’m sure that more time on it would reveal a bit more detail in the dimmer parts of the nebulosity.

I’ll be back in a week – hopefully with some more images.


About Greg Marshall

I am a retired electronics engineer and after a few months of enjoying my leisure I began to miss doing product development. My astronomy hobby always needed new solutions to unique problems, so I decided that whenever I came up with a good solution I would try to make it available to others.

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