Combination of 15 5-minute images with an H-alpha filter, 20, 5 minute images with an SII filter and 20, 5 minute images with an OIII filter.
SBIG STL-1001E CCD. 5" f/5 refractor at prime focus.
IC 1396 is a faint nebula is Cygnus surrounding the open cluster Tr37. It is situated a little less than 10 degrees north of M39 and about 5 degrees south of alpha cephei. The cluster appears as a scattered group of stars. There was no sign of the nebula in a 10" telescope.
The above image was processed using the H-alpha images as the red channel. This is the preferred palette of the European Southern Observatory. The HST observers prefer to use the SII images as the red channel since the SII line is at a slightly longer wavelength than the H-alpha line. This results in a more green-dominated image as shown below.
