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Enhanced Uranus showing Polar Cap and possible Aurora

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HH555 narrow band

Started by hakescl, 08/16/2009 09:36PM
Posted 08/16/2009 09:36PM Opening Post
Finally got a chance at editing the [SII] and combining with the H-a and [OIII] from a couple of weeks ago. Originally trying to take data to compare with what Richard Crisp posted a while back. These were all 5-minute subs. Imported with an arcsine stretch and then smoothed the dim areas. I had to do some "extra" processing of those long oval stars on the H-alpha for this version. Finally, a little sharpening at the end.

And now I may need to start over from the beginning. With continued tweaking, guiding was getting better, and the later sub-frames had MUCH rounder stars than what I started with. (Re-extra-tightening of my home-made mirror lock screw, and back to the "original" guide scope. Again with extra-re-tightening of everything.) Looks like I will get a chance to verify performance tonight if I keep my fingers crossed just right.

So with my intention of "helping" this with additional/different data, I am mostly curious about comments on the processing. Particularly about the contrast and color balance here? Richard already commented that he is not into smoothing anything. Thoughts from anyone else? Thanks for looking.

Charlie


Attached Image:

hakescl's attachment for post 47915

Fort Lewis Observatory: (37.238, -108.052) ~2360m (7744 ft.) elevation.
Darkness - typically 6.5+
Scope - Meade 16" LX200; f6.3 focal reducer
Focus - JMI Smart focus
Camera - SBIG ST-10XE; (~.5"/pixel)
Guiding - AO-8 and/or Meade 5"/DSI/PHD
http://www.fortlewis.edu/observatory
Posted 08/17/2009 01:47AM #1
Great image Charlie! I like the tri-color narrowband version a lot.
Cheers,
Tyler

"The expression of the beautiful is in direct ratio to the power of perception acquired by the artist." (Gustave Courbet)