Pythagoras Complex

Pythagoras and Environs
Sketch and Commentary by Richard Handy

Pythagoras of Eratosthenian age, is a large 130 km complex crater perched high in the northwestern quadrant above Mare Frigoris and very close to the Moon’s limb. If you have a Rukl Atlas you’ll see this region on plate 2.

Here are the sketch details:

Feature: Pythagoras and environs
Time: 6:30 UT to 8:30 UT
Lunation: 14.04 days Phase: 17.1 deg. Colongitude (geocentric): 77.3 deg.
Illumination: 97.8% Libration in Latitude: +5 deg. 41 min. Libration in Longitude: -4 deg. 28 min.
Seeing: Antoniadi II-III Weather: clear, calm.
Telescope: 12″ SCT Focal ratio: f/16 (1.6X nose piece on binoviewer)
Binoviewer: W.O. Bino-P Eyepieces 12.4 mm Meade 4000 series plossls
Magnification: 393X
Sketch medium: White and black Conte’ crayon and White Crayola chalk on black Strathmore paper.
Sketch size: 18″ x 24″