NGC7023 The Iris Nebula
This Nebula is so named due to it’s similarity to an iris flower. It is found in the constellation of Cepheus.
This image taken from a dark site at Kelling Heath, Norfolk on the night of 26 September 2014 consists of 21 x 300s of luminance and 10 x 300s each of R,G and B, i.e. 8 and a half hours of exposure. This was with a William Optics Megrez 90 telescope and Atik 460EX camera with Astrodon LRGB filters.
NGC7023 is a reflection nebula (hence the blue colour) embedded in a region of the Milky Way darkened by dust. It is about 6 light years across and 1300 light years distant.