Waid Observatory

Object: Sh2-112

Date: July 31, Aug. 1-2, 2023  -   Location: DSOC, Fort Davis, TX
Telescope: 16 inch RC  -  Camera: FLI 16803  -  Mount: Paramount ME II
Exposure: Ha, OIII, SII 16x10 min. each filter - RGB for Stars 15x2 min. each filter - All Bin 2x2

Click on the image to view at higher resolution.



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 is known as a mapped, or false color, image and was acquired using narrowband filters.  It was assembled using the standard Hubble Palette with SII mapped to Red, Ha mapped to Green and OIII mapped to Blue.  Stars were overlaid with data from a separate RGB filtered image.  A bi-color (HOO), near true color, version of Sh2-112 may be viewed here.

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/ <

Copyright Donald P. Waid