Each color data set combined in Meade's AutostarSuite Image Processing (ASIP) using median combine.
Aligned channels with each other with ASIP.
Import those files to photoshop 7 via FITS Liberator plugin.
Channel Merged the RGB data sets.
Added the luminance data as an underlying layer and set the blend mode to color for the RGB data.
Adjusted levels and Curves a bit
Minor HSL adjustment to taste
A few other adjustments in PS7 that I don't recall, sorry bout that.
Description:
Discovered by Charles Messier in 1764.
M39 is a very large but very loose open cluster, situated some 9 degrees east and a bit north of Deneb (Alpha Cygni). Its distance is only about 800 light years, and it is of intermediate age (estimates between 230 and 300 million years). 30 stars are proven members and contained in a volume of about 7 light years diameter. Its apparent visual brightness of 4.6 magnitudes corresponds to an absolute magnitude of -2.5, or an intrinsic luminosity of 830 suns.
