Cave in the sky

Cepheus attacks again – this time with the Cave nebula (aka Sh2-155 or Caldwell 9). It is beautiful object in LRGB, but requires dark sky for this technique. My backyard sky is not so fortunate, so I decided to picture it with HaRGB filter set. There is 12 hours of exposures total with 130mm triplet refractor and Atik383 camera. 

Sh2-155 Cave nebula with vdB155 in the lower right

Full size here

At the lower right part there is vdB155 reflection nebula. And little bit to the left – faint, but evidently red carbon star.
Clear skies!

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