Youthful Tycho Crater

Sketching: For this sketch I used: black Strathmore 400 Artagain paper, 8”x 11”, white and black Conte’pastel pencils and a blending stump. Brightness was slightly decreased (-7) and contrast increased (+5) after scanning using Microsoft Office Picture Manager. Telescope: 10 inch f/5.7 Dobsonian and 6mm eyepiece 241x Date: 3-17-2008 0:45 - 1:55 UT Temperature: -0.8°C (31°F) high cloud cover and high humidity, calm Seeing: Antoniadi III Co longitude: 28.1° Lunation: 9.3 days Illumination: 77.2 % Phase: 57.0° Observing Location: +41°37' +87° 47' Frank McCabe