Crater Pythagoras on the Last Evening of Winter

Sketching Information Pythagoras Crater on black 400 Series Strathmore paper using white and black Conte’ pastel pencils Sketch Date: March 19, 2011, a time of favorable libration for this crater using a 13.1-inch f/6 Dobsonian telescope riding on an equatorial platform with a 6mm eyepiece for 333x at 05:05-07:00 UT Seeing: Antoniadi III Weather clear, calm, 32 degrees F (0 degrees C) Lunation 14.3 days Moon 99.6% illuminated Colongitude 83.9° Latitude Libration +07° 06' Lunar Distance: Near Perigee Rükl Atlas Pl 2 Frank McCabe