Rheita Valley

Sketching: For this sketch I used: black Strathmore 400 Artagain paper, 8”x 10”, white and black Conte’pastel pencils and a blending stump. Brightness was slightly decreased (-5) and contrast increased (+5) after scanning using Microsoft Office Picture Manager. Telescope: 10 inch f/5.7 Dobsonian and 6mm eyepiece 241x Date: 2-24-2008 0:10-1:00 UT Temperature: -8°C (19°F) clear, calm Seeing: Antoniadi III Co longitude: 123.2° Lunation: 17 days Illumination: 90.1 % Phase: 323.3° Frank McCabe