Posidonius Crater at Sunrise

Sketching Information Posidonius crater on ebony black Canson paper using white and black Conte’ pastel pencils Sketch Date: May 8, 2011, using a 10 inch f/5.7 Dobsonian telescope riding on an equatorial platform with a 6mm eyepiece for 241x at 01:15-02:30 UT Seeing: Antoniadi III Weather clear, breezy, 55 degrees F (12 degrees C) Lunation 4.8 days Moon 21.5% illuminated Colongitude 331.6° Rükl Atlas Pl 14 Frank McCabe