This cloud of nebulosity lies in the constellation of Cepheus the King. The sky conditions were very clear with no moonlight, stars were visible down to about magnitude 4.7. I was using my ten inch f/4.8 reflector, a Vixen Atlux mount, PHD auto guiding, a set of Astronomik narrowband and RGB filters and an Atik 383L mono CCD camera. I captured five minute sub frames, dark frames, flat field frames and dark flat frames with the camera set on X2 bin mode.
This increases the sensitivity of the camera, therefore reducing the total amount of exposure time.
The exposure time was 80 minutes using a blue filter, 30 minutes using an O111 filter and 150 minutes using a H-alpha filter .
A total exposure time of four hours and twenty minutes.
Barnard 175
