|Cocoon Galaxy with
About the same time as the Antarctic continents' climate was beginning to change
from a hot, greenhouse to the frozen land we know now, between 40 &
50 million years ago, A massive star exploded in what we know as the 'Cocoon
Galaxy, NGC 4490.
I eventually ended up with 13 hrs 22 minutes worth of subs taken over
a couple of weeks of which I used 10 hours 22 minutes worth.
Luminance-43 x 6 minutes
Click on image below for full size version
|Scope was a 14 inch LX200GPS @ F6.3
Camera, Atik 16HR
Tal 100R & DSI pro guiding @ F10 with PHD
Ha data was blended with the red channel at 50% opacity by converting
the monochrome red channel to RGB and adding the Ha data as a luminance
layer, then flattening the layers and converting back to greyscale.