M81 - Bode's Nebula |
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Description:
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Big, bright, beautiful spiral in Ursa Major |
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Telescope/Mount:
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C9.25 @ f/6.3 on a Losmandy GM200 mount |
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Camera and Control Software:
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Starlight Xpress HX916 unbinned (0.93 arc-secs per pixel); Maxim DL-CCD 3.05 |
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Exposure:
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9x5mins |
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Calibration:
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Dark subtraction (but no flats, need a lightbox for the C9.25) |
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Processing:
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Maxim DL-CCD 3.05: lognormal histogram specification, linear stretch, unsharp mask-FFT/medium |
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Guiding:
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ST4 and Orion Apex 90 Mak-Cass |
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Date and Location:
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08-Feb-02 between 10pm-11pm at Dinosaur Point near Los Banos, California |
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Seeing, Transparency and Conditions:
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Seeing was excellent, approx. 4/5. Transparency was quite good; limiting naked eye mag was approx. 6.4. Temperatures were in the low 40's - upper 30's, with a light breeze. Brrr! |
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Comments:
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Seeing deteriorated before I could get RGB frames, will try to get those next time out |