Southwestern Mare Humorum
Mare Humorum is a small circular sea on the southwestern side of the visible lunar
surface. The thick floor is intermediate in age between the Nectarian and Imbrian
basins. This sketch is focused on the southern perimeter of Humorum and includes
from west to east craters: Doppelmayer (66 km.); Lee (43 km.); Vitello (43 km.)
the youngest and only one of the three with a complete rim. The ghost-like nearly
lava buried crater Puiseux (25 km.) can be seen north of Lee on the floor of Mare
Humorum. Rupes Kelvin and Promontorium Kelvin are both visible east and north of
crater Vitello. I made this sketch while evaluating the performance of a 6” f /7.9
Newtonian telescope.
Sketching:
Date and Time November 2, 2006 1:30-2:30 UT
8.5” x11” copy paper, 2 HB graphite pencil, black ink marker pen
10.8 day old waxing gibbous moon
Colongitude: 45.7°
Illumination: 84 %
Seeing: Pickering 4/10
6” f 7.9 Dob. 6mm ocular 200x
Frank McCabe
Very detailed Frank, a lot of work went into that drawing I know! The optics obviously passed the test.
Go well, Dale
Dale,
Thanks for the kind words. Yes indeed the scope came out well. The owner is pleased with it.
The best to you.
Frank