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Exposure: LRGB - 100:60:30:30 min
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L binned 1x1, RGB binned 2x2
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RGB Combine Ratios - 1.14:1:1.26
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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 @ 0.2Hz
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Camera: SBIG ST-2000XM, SBIG CFW-8
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Location: My backyard in Goleta, CA
- Date/TIme: L: February 1, 2003, 00:43-02:44 PST
RGB: February 3, 2003, 01:40-03:50 PST
- Processing, Taken, and reduced in CCDSoft v5.
Combined with Ray Gralak's
Sigma Combine. Two iterations of Lucy-Richardson deconvolution in
CCDSharp to Luminance only. Curves applied in Photoshop.
Color
combined in CCDSoft. Luminance added in Photoshop.
Selective
gaussian blur to dim areas in Photoshop.
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Name: M81, NGC3031, Bode's Nebula
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Type: Spiral Galaxy
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Constellation: Ursa Major
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Distance: 4.5 million light years
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Angular Diameter: 26.9' x 14.1'
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First Discovered By: Johan Elert Bode,
1774
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Documented by Messier: February 9, 1781
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