Another nebula in the constellation of Cygnus, the Crescent Nebula, designation NGC 6888, is a wonderful small emission nebula with a very characteristic structure. It is ca. 5000 ly from Earth. The unusual structure is formed by the fast stellar winds from the Wolf-Rayat star WR 136 (HD 192163) colliding with the material eject by the star when it was a red giant around 250,000 to 400,000 years ago. This image was taken with a full colour camera, where the wisps of O-III emission are clearly visible around the highly structured nebulosity. Being only 2 degrees southwest of the star Sadr, the Crescent Nebula is embedded within the broader nebulosity of the Cygnus constellation. The image is part of our “Klein & Fein” showcase.
TS94EDPH (with Reducer)
10Micron GM1000 HPS
SIGMA fp L (colour)
Optolong L-Extreme filter
ca. 2 hrs, ISO 1600, F4.4, 414mm