Just north of Mare Crisium and formed during the Nectarian period is the 128 km. walled plain crater Cleomedes. This crater has a high but worn margin and was nicely catching the last rays of sunlight overnight. Selenologists believe the floor may have been flooded by lava that reached the crater through fractures from the molten lava of Mare Crisium. What remains of the central peak is a low wall oriented north-south and somewhat off center. A hint of 60 km. long Rima Cleomedes was just detectable north of the central wall running off to the southeast. To the northwest of Cleomedes is 57 km. crater Burckhardt straddled by its close partners E and F (both deep in shadow). Off to the northwest is crater Tralles (43 km.) hugging the rim and on the floor of Cleomedes are small craters J and B seen near the central wall.
For this sketch I used: black Strathmore 400 Artagain paper, white and black Conte’
pastel pencils. In addition a small artist’s brush and powdered Conte’ white crayon was used for blending. Contrast was slightly increased (+2) using a scanner to better match the original.
Telescope: 13.1 inch f/ 5.9 Dobsonian and 6 mm eyepiece 327 X
Date: 12-1-2012, 06:10-07:30 UT
Temperature: 3.9° C (39° F)
Partly cloudy, light winds
Seeing: Antoniadi III
Colongitude 122.4 °
Lunation 17.35 days
Illumination 93.8 %