SOCO IMAGE GALLERY


 

Sharpless 155    Cave Nebula

Sharpless 155 is an open cluster with associated emission nebula located in the Milky Way stream in the constellation Cepheus. It is commonly called the Cave Nebula because the large dark void in the otherwise bright nebula created by foreground dust clouds gives the impression of the mouth of a cave. The nebula is fairly large, extending over an area of 50 × 30 arc-min. It has a magnitide of 7.7, but is not easy to pick out visually because this brightness is spread out over its large size. Physically, the nebula spans around 35 LY and lies at a distance of around 2400 LY.

Date(s) Acquired: 1 December 2015
Telescope: Orion 120mm EON Apochromatic Refractor
Camera: QSI Model 583 with Optec NextGEN Ultra Widefield 0.7X Telecompressor

 

   Exposure Time (min) 
   Number of Exposures
   RGB
   1.5
   Hα
   15
   Hβ
   -
   OIII
   -
   RGB
   10
   Hα
   6
   Hβ
   0
   OIII
   0

 

Processing:
Master red, green, blue and Hα images created using SuperSIAM.
Hybrid master red image created using Basic Processing Procedure II.
Color composite image created using Basic Processing Procedure III.
Color composite image contrast-stretched using Adobe Photoshop.




 

 

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