M51 & NGC 5195 RGB (Whirlpool Galaxy)
Distance from Earth: 37 million light years
Constellation: Canes Venatici
Telescope: 12.5" RCOS
Camera : STL11000, off axis guiding
Mount : AP1200
Image date: Mar 2009
-- Filters used and total time--
Luminous 220 minutes
Red 40 minutes
Green 40 minutes
Blue 40 minutes
Ha
OIII
SII