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Astrodude

© 2004 - 2008 Astrodude
M51 - Whirlpool Galaxy
M51 - Whirlpool Galaxy
Date: May 3, 2008
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SBIG ST2000XM w/CFW-8a
Astrodon Series I RGB filters
Takahashi FSQ-106n
Astro-Physics AP900GTO cp2 mount

Filter Data:
Luminance = 140 minutes
Red = 40 minutes
Green = 40 minutes
Blue = 40 minutes
120 second sub-exposures autoguided by the integrated guider

Total exposure time 260 minutes (over 4 hours!)

Processing: Maxim DL, FITS Liberator and Photoshop CS.