Globular cluster M15

This is my first serious attempt with RGB images using the Parsec camera. I used an exposure time which left the cluster's core slightly unsaturated (about 62,000 ADU) to maintain separation - this cluster has a very compact core. Unfortunately, my red images were slightly unfocussed which created excessive haloes around red stars, turned some stars magenta (probably should have been cyan) and made the red stars within the cluster too large.

Verendrye airstrip; August 30, 2011, 9:30 PM - 2:30 AM; T=10 C, transparency 3/5 and seeing average but high humidity. 120ED with Parsec camera, 500s (7xred, 7xgreen, 10x blue, unbinned).



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