Celestial hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  LBN 527  ·  LBN 529  ·  Sh2-155
SH2-155 HaLRGB, Sergiy_Vakulenko
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SH2-155 HaLRGB

SH2-155 HaLRGB, Sergiy_Vakulenko
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SH2-155 HaLRGB

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Description

Sh2-155 (also designated Sharpless 155 or S155) is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. It is widely known as the Cave Nebula. Sh2-155 is an ionized H II region with ongoing star formation activity, at an estimated distance of 725 parsecs (2400 light-years) from Earth.

Update from 1/20/2022:
This image was considered as a Amateur Astronomy Picture of the Day for Jan 18 2022 - https://www.aapod2.com/blog/Sh2-155-cave-nebula . That's first time when my photo win something

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SH2-155 HaLRGB, Sergiy_Vakulenko