Celestial hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  HD216102  ·  HD216103  ·  HD216380  ·  HD216425  ·  HD216532  ·  HD216572  ·  HD216629  ·  HD216658  ·  HD216711  ·  HD216898  ·  HD216926  ·  HD217035  ·  HD217061  ·  HD217086  ·  HD217099  ·  HD217312  ·  HD217463  ·  HD217657  ·  HD217730  ·  HD217872  ·  HD217966  ·  HD217979  ·  HD218066  ·  HD218139  ·  HD218229  ·  HD218342  ·  LBN 521  ·  LBN 524  ·  LBN 527  ·  LBN 529  ·  And 9 more.
Sh2-155 The Cave Nebula, Dave Boddington
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Sh2-155 The Cave Nebula

Sh2-155 The Cave Nebula, Dave Boddington
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Sh2-155 The Cave Nebula

Equipment

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Description

The Cave Nebula and surrounding area imaged over the last week through my Esprit100/SX46 and GT71/ASI1600. 2hrs Lum and 4.5hrs each RGB on the Esprit100 and 8hrs Ha on the GT71. Processed in Pixinsight, APP and Photoshop.

From Wiki…. Sh2-155 (also designated Caldwell 9, 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, 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[4] 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. It has been suggested that radiation from the hot O-type star HD 217086 is compressing the region, triggering the formation of a new generation of stars. A study of the region's young stellar objects by the Chandra X-ray Observatory and Spitzer Space Telescope shows a progression of stellar ages in front of the cloud, supporting the hypothesis of triggered star-formation

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  • Sh2-155 The Cave Nebula, Dave Boddington
    Original
  • Final
    Sh2-155 The Cave Nebula, Dave Boddington
    B

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Sh2-155 The Cave Nebula, Dave Boddington