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M51 Whirlpool Galaxy in Canes Venatici. Imaged with a Starlight Express HX916 on Skywatcher M-N 190 F5.3/EQ6, with QHY LRGB Filters guided by PHD using IKI 80mm F7 Achromatic Guidescope and QHY5 camera, stacked in DSS and processed in Photoshop CS.Luminance 90 minutes, 30 minutes each for RGB binned 2x2 [Ian Smith}