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Exposure: LRGB - 280:60:60:60 min
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L binned 2x2, RGB binned 3x3
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RGB Combine Ratios - 2.27:1:1.26
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Telescope: Meade 10" LX200 @ f/10
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Mount: Meade field tripod w/ super wedge
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Guiding: AO-7 @ 4 Hz (Luminance)
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Camera: SBIG ST-2000XM, SBIG CFW-8
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Location: My backyard in Goleta, CA
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Date/Time: L: March 2, 2003, 00:39-05:30 PST
RGB: March 3, 2003, 00:24-03:27 PST
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Processing, Taken, and reduced in CCDSoft v5. Combined with Ray Gralak's
Sigma Combine. Curves and Levels applied in Photoshop. Color
combined in CCDSoft. Selective unsharp mask/gaussian blur to Luminance
in Photoshop. Luminance added in Photoshop.
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Name: M51, NGC5194, The Whirlpool Galaxy, NGC5195 (companion)
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Type: Spiral Galaxy
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Constellation: Canes Venatici
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Distance: 15 million light years
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Angular Diameter: 11.2' x 6.9'
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Physical Diameter: ~50,000 light years
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First Discovered By: Charles Messier, October 13, 1773
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