With the first clear night in more than one week, I was able to catch the sunset across crater Posidonius (99 km) at the northeastern edge of Mare Serentatis. Posidonius A (11 km.) , the highest of the small central peaks and the tilted and uplifted concentric ridge were the last features catching the light at sunset inside the rim. Also visible and included in this sketch was the northern most portion of Serpentine Ridge. As temperatures were falling throughout the night, I found myself stopping to warm my hands indoors not once but several times. The lunar viewing was excellent this night.
For this sketch I used: black Strathmore 400 Artagain paper, white and black Conte’ pastel pencils and a blending stump.
Telescope: 10 inch f/ 5.7 Dobsonian and 9 mm eyepiece 161X
Date: 01-02-2013: 04:30 – 06:00 UT
Temperature: – 16° C (2° F)
Seeing: Antoniadi III
Lunation: 19.83 days