From: "jimchung2338" <jim_chung@sunshine.net>

Date: October 31, 2007 8:48:49 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Comet Holmes Oct 30 from Toronto

I thought I'd experiment with longer exposure imaging with the PGR Flea using that most 

convenient of recent target - Comet Holmes.  Subs were taken at 5s with automatic dark 

frame subtraction via AstroIIDC.

http://tech.groups.yahoo.com/group/Astro_IIDC/files/Planetary/Holmes_FleaRGB.jpg

I think the colors are faithful and there is siginificantly less green in the outer cloud as 

compared to a shot I took 2 days earlier with my Starlight Express CCD.  

Milton,  are you planning to change the algorithm used in sum stacking images.  Using 

AstroIIDC I can really only stack about 10-12 5s subs before I reach the maximum white 

levels values in  the comet nucleus.  I had to resort to exporting the movies as individual 

TIFFs and stacking them in another program.  There wasa real benefit in stacking the full 5 

minute exposures in terms of noise reduction.