description Sh2-112 Overview
Sh2-112 is an H II region, meaning a cloud of ionized hydrogen associated with massive stars and ongoing or recent star formation. It lies in the constellation Cygnus and is listed in the Sharpless catalog of emission nebulae. The object is commonly described as having a rounded or shell-like appearance and is located in the same broad Cygnus sky region as Deneb, one of the constellation's brightest stars.
help Sh2-112 FAQ
What kind of object is Sh2-112?
Sh2-112 is an H II region, meaning an emission nebula containing ionized hydrogen and active or recent star formation. It lies in the constellation Cygnus and is listed in the Sharpless catalog. [Source](https://arxiv.org/abs/2010.11065)
What star powers the glow of Sh2-112?
Astronomical studies identify the massive O8V star BD+45 3216 as the main ionizing source. Its radiation excites nearby hydrogen gas and makes the region shine in emission wavelengths. [Source](https://arxiv.org/abs/2010.11065)
Why is Sh2-112 considered a star-forming region?
Observations find ionized gas, molecular material, and young stellar-object candidates in the region. That combination distinguishes Sh2-112 from a planetary nebula formed by a dying low-mass star. [Source](https://arxiv.org/abs/2209.09609)
How do astrophotographers usually image Sh2-112?
It is commonly photographed with long exposures and narrowband filters such as H-alpha, O III, and S II. Those filters bring out the glowing hydrogen and oxygen structures around BD+45 3216 in Cygnus. [Source](https://arxiv.org/abs/2010.11065)
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