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Jupiter 8 13 2009


Jupiter 8 13 2009

Sketching: 8/13/2009, 5:45 -6:45 UT Telescope 10" f/5.7: 6mm ortho. (241 x) Sketch made on 9"x 12" sketching paper with 6B, 4B and HB graphite pencils, plastic and gum erasers, blending stumps. Contrast increased +2 and brightness decreased -2 using the scanner Seeing 7/10 Transparency 2/5 Partly cloudy, 72% humidity, 20°C (68°F) Frank McCabe



    Photo
    mathteacher
    Aug 31 2009 08:53 PM
    Nice work! Looks like you have a Planet Killer!
    Ging-Li, Thank you. The f/5.7 is a good all around focal length. But as you no doubt know a longer focal length would work better on planetary detail. Frank :)



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