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M109 Barred Spiral (Ursa Major)

M109 is a barred spiral in Ursa Major (The Plough). Seven other galaxies are easy to make out, and there are several other smaller and fainter galaxies can just about be seen. Notice how blue the two edge on spiral galaxies are, and how red the small99 galaxy near the right hand edge is.

Date B&W: 4th March 2010  RGB: 7th March
Telescope 250mm F4.8 Newtonian Reflector with MPCC coma corrector
Filter Astronomik CLS + Astronomik IR Block
Exposure (seconds) Luminance: 20x600s (3 hours, 20 minutes)
Red: 12 x 300s
Blue: 12 x 300s
Ha:   12 x 300s
Software MaximDL, CCDstack, PixInsight