celestial objects

HaLRGB 340 217 98 98 98

Tele Vue NP 127fli

ASA DDM 60 Pro

FLI ML 16200

 

Constellation Cepheus

Ra  22:57:17.14

Dec +62:28:33.4

Sh2-155 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, though that name was applied earlier to Ced 201, a different nebula in Cepheus. Sh2-155 is an ionized H II region with ongoing star formation activity, at an estimated distance of 2400 light-years from Earth. Sh2-155 was first noted as a galactic emission nebula in 1959 in the extended second edition of the Sharpless catalogue, being a part of the much larger Cep OB3 Association. Sh2-155 lies at the edge of the Cepheus B cloud (part of the Cepheus molecular cloud), and is ionized by young stars from the Cep OB3 association.

Sh2-155 Cave Nebula

© 2017 Copyright Patrick Winkler

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