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Crater Clavius


Crater Clavius

Sketching: For this sketch I used: Canson sketching paper , 9”x12”, white and black Conte’ pastel pencils and blending stumps. Brightness was adjusted after scanning. Telescope: 10 inch f/ 5.7 Dobsonian and 6 mm eyepiece 241x Date: 7-10-2011 01:15-03:00 UT Temperature: 27°C (80°F) Partly to mostly cloudy, breezy Seeing: Antoniadi III-IV Co longitude: 21.4° Lunation: 8.69 days Illumination: 70.1 % Frank McCabe






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