Eddington, Struve and Russell

Sketching: For this sketch I used: black Strathmore 400 Artagain paper, white and black Conte’ pastel pencils and a blending stump. Contrast was slightly increased after scanning. Telescope: 10 inch f/ 5.7 Dobsonian and 9 mm eyepiece 161x Date: 8-27-2007, 3:30-4:30 UT Temperature: 23° C (74° F) Clear, transparent, calm Seeing: Antoniadi III Colongitude 80.4 ° Lunation 14.3 days Illumination 98 % Libration long. - 6° Frank McCabe