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M101 - Spiral galaxy - 4/4/07

M101 - Spiral galaxy in Ursa Major; 27 million light years away

Remotely imaged at Tzec Maun
Telescope AP 206
Camera SBIG STL-11000
Focal Length 1620mm
Focal Ratio f/7.87

RGBL minutes 10/8/8/5

Nebulosity: badpixel map; RGB stack
Photoshop: Levels and curves RGG and L; stack RGB+L
Astronomy Tools Plugin: Light Pollution Removal

m101_20070505_rrm.jpg M101_RGBL_large.jpg m81_10min_20070322_rm_atlpr.jpg m83_20070512_rrm.jpg m86_20070324_18min_rm.jpg