NGC7000. The North America Nebula.
This patch of nebulosity lies about one degree from the bright star Deneb in the constellation of Cygnus the Swan. From a dark sky site it can be seen with the naked eye covering an area of sky about the size of the full moon.
The conditions were very warm and humid with poor transparency. Stars were only visible down to about magnitude 3.5 to mag 4 with bright moonlight to contend with rising in the east.
I was using my ten inch reflector piggybacking my Atik 383L mono CCD camera with a 200mm F4 lens, Astronomik filters were placed in front of the lens mounted on a Vixen Atlux mount.
I captured two minute sub frames with matching dark frames and combined them with flat field frames to reduce the effect of noise and vignetting in the final image. Thet total exposure time was 40 minutes using a H Alpha filter, 30 minutes using an O111 filter, 20 minutes using an S11 filter and ten minute for each RGB filter.
RGB
Hubble Palette
