Plato the Crater

Sketching: For this sketch I used: black Strathmore 400 Artagain paper 10”x12”, white and black Conte’ pastel pencils and a blending stump. After scanning, Brightness was decreased (-2) and contrast increased (+2) using Microsoft Office Picture Manager. Telescope: 10 inch f/ 5.7 Dobsonian and 9 mm eyepiece 161x Date: 9-10-2008, 1:15 - 2:30 UT Temperature: 15° C (60° F) clear, calm Seeing: Antoniadi III Colongitude 29.6 ° Lunation 10.2 days Illumination 72.7 % Frank McCabe