Sunday, July 13, 2014

lost disk in color

what color are the Ha (hydrogen alpha) images of the sun?
hydrogen alpha is red, but viewing thru my solar scope, it looks reddish orange to me
no idea why, the filter is clearly red.

the images below are composites, combining a short exposure which picks up the bright surface detail
with a longer exposure burning out the center in order to pick up the faint prominences projecting off the edge of the disk.  
when combining these the prominences typically appear brighter than the disk, an artifact of processing in an attempt to bring out the faint detail in the prominence

in the first colorized version below, i used orange for the central structure and pure red for the prominences
in an attempt to correct for this brightening:




seemed like a good idea, but a bit of the detail in the prominences is lost 
here's a more aesthetically pleasing version with yellow flames shooting off the surface:



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