M51 - The Whirlpool Galaxy in Canes Venatici
by Bob and Janice Fera
Parallax Instruments 12.5" f/9 Ritchey Chretien
Yankee Robotics Trifid-2 6303E
Astrodon Filters
LRGB Composite - 180:80:80:80 minute exposures
20-minute sub-exposures, RGB binned 2x2
CCDstack, MaxIm/DL with RC-Astro plugin, PixInsight LE and Adobe Photoshop
Taken April 30 and May 1, 2006 from Eagle Ridge Observatory, Foresthill, CA