NGC7000. The North America nebula. This large patch of nebulosity lies about one degree east of the bright star Deneb in the constellation of Cygnus the swan. On this particular evening the moon was full and stars were only visable down to magnitude 3. I was using my 4 inch f/6.3 refractor, a Vixen Atlux mount, PHD auto guiding, an Atik 383L mono CCD camera and a set of Astronomik narrowband filters, S11, O111 and H-alpha. I captured five minute subframes with matching dark frames and combined them with flat field frames and bias frames reducing the effect of noise and vignetting in the final image. The total exposure times were 60 minutes using an O111 filter, 60 minutes using a H-alpha filter, 50 minutes using a S11 filter and five minutes using a blue filter.
Hubble Palette
RGB
B33 data from two telescopes: a 4 inch F/6.3 refractor and a ten inch F/4.8 reflector.
