Sh2-112, as listed in the Sharpless Catalog, is a relatively small emission nebula[1] located in the constellation Cygnus the Swan[3] about 1.5 degrees from the bright star Deneb[3]. This bright nebula is excited to glow by a massive star catalogued BD+45 3216[2]. This star lies approximately 2.1 kilo parsecs (6849 light years)[2] from the Earth. It is the bright star on the lower eastern edge of the dark dust band that transvers the nebula from the north to south. The nebula is a stellar nursery containing a rich population of young stars with an average age of about 1 million years[2]. The displayed Sh2-112 image is oriented with north to the top and east to the left.
The image above was assembled as a bi-color image using narrowband filters. Ha filtered data was mapped to Red and OIII data mapped to Green and Blue. Stars were overlaid with data from a separate RGB filtered image. This method produces a near true color image. A Hubble Palette (SHO) version of the image may be viewed here.
References
1NOIRLAB: https://noirlab.edu/public/images/noao-sh2-112/
2Alik Panja, Yan Sun, Wen Ping Chen, Soumen Mondal 1922: https://arxiv.org/pdf/2209.09609.pdf
3AstroCarballada: https://astro.carballada.com/sh2-112-in-hsorgb/
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