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#1
September 14th 10, 01:15 AM
posted to alt.binaries.pictures.astro
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ASTRO: Bubble at 1.5 hours Ha under exceptional seeing conditions
from Friday night: no moon exceptional seeing conditions
I measured 1.88" stars in 15 minute guided subexposures! http://www.narrowbandimaging.com/ngc...s4_ha_page.htm FIT data included this time processing was simple stretch and curves; no further processing image scale for the FIT is 0.453"/pixel roughly 
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#2
September 14th 10, 06:00 PM
posted to alt.binaries.pictures.astro
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ASTRO: Bubble at 1.5 hours Ha under exceptional seeing conditions
There is something satisfying about monochrome images, more subtle
detail, easier for these old eyes to process, etc. The bubble itself reminds me of the solar sytem moon (either jupiter or saturn) with the huge crater. On Mon, 13 Sep 2010 17:15:43 -0700, "Richard Crisp" wrote: from Friday night: no moon exceptional seeing conditions I measured 1.88" stars in 15 minute guided subexposures! http://www.narrowbandimaging.com/ngc...s4_ha_page.htm FIT data included this time processing was simple stretch and curves; no further processing image scale for the FIT is 0.453"/pixel roughly
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