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Sh2-115

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description Sh2-115 Overview

Sh2-115 is an emission nebula and H II region in the constellation Cygnus, catalogued in Stewart Sharpless's survey of ionized hydrogen regions. It lies in a rich Milky Way star field northwest of Deneb and is associated with active star formation; radiation from hot young stars, including members of the open cluster Berkeley 90, ionizes its gas. Its broad, faint structure makes it a target for wide-field astrophotography using hydrogen-sensitive imaging.

help Sh2-115 FAQ

What kind of object is Sh2-115?

Sh2-115 is an emission nebula and H II region in the constellation Cygnus. It is a Milky Way star-forming region, not an external galaxy.

What does the Sh2 in Sh2-115 refer to?

The name comes from Stewart Sharpless's survey of ionized hydrogen regions. Sh2-115 is one catalog entry in that Sharpless naming system.

Why does Sh2-115 glow?

Radiation from hot, young stars ionizes hydrogen gas in the H II region. When the gas recombines, it produces the emission-nebula glow associated with Sh2-115.

Where is Sh2-115 in the Cygnus sky?

It lies in a rich Milky Way star field northwest of Deneb. Its location links it to the dense star field around Cygnus and to active star formation.

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