M81 - Spiral Galaxy in Ursa Major
by Bob and Janice Fera
Officina
Stellare RC-360AST 14" f/8 Ritchey Chretien Cassegrain
with single-element Riccardi field flattener
Apogee Alta U16M CCD Camera
Astrodon Filters
LRGB Composite - 180:90:90:90 minutes
L:9x20m R:6x15m G:6x15m B:6x15m
Image acquired with CCDAutopilot
Processed in CCDstack and Adobe Photoshop
Taken February 2,4,6, 2011 from Eagle Ridge Observatory, Foresthill, CA
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