Mare Crisium

Sketching: For this sketch I used: 400 series black Strathmore Artagain paper 9"x 12", white and black Conte' pastel pencils , and Conte'crayons, a blending stump, plastic eraser. Brightness was decreased -2 and contrast increased +1 using the scanner for this sketch Telescope: 10 inch f/ 5.7 Dobsonian with 6mm (241x) Date: 12-23-2010 10:00 – 11:30 UT Temperature: -8°C (18°F) Weather: clear, calm Seeing: Antoniadi III Co longitude: 120° Lunation: 17.7 days Illumination: 94.5% Oak Forest, Illinois Frank McCabe