CM stands for Central Meridian, the line of longitude pointing toward us at the time of the sketch.
Sketches of Mars: 2003 Opposition.
Some earlier attempts at sketching Mars.
Sketches of targets other than Mars.
Some Great Mars Sketch Pages: Jane Houston | Wes Stone
12/05/05 21:30 PST. Tak FS128 with binoviewer, but poor seeing. CM=336.|
Meridiani centered, with Erythraeum (left) and Syrtis Major (right). At right, the sketch as made at the eyepiece, to be finished indoors with better light and warmth and smudging tools.
11/27/05 20:40 PST. Tak FS128 with binoviewer. CM=36.5.|
Erythraeum and Margaritifer.
11/23/05 22:00 PST. Tak FS128 with binoviewer. CM=92.|
Lacus Solis and the "Eye of Mars".
11/21/05 22:15 PST. Tak FS128 with binoviewer. CM=115.|
Lacus Solis, the "Eye of Mars", and Mare Sirenum.
11/19/05 22:15 PST. Tak FS128. CM=130.|
Sirenum and Chrysokeras. Lacus Solis not resolving into a separate area, so no "Eye of Mars" effect yet.
11/16/05 22:30 PST. Tak FS128. CM=162.|
Interesting bright patches just north of Sirenum and Cimmerium.
11/13/05 22:45 PST. Tak FS128. CM=188.|
Interesting bright spots just north of Sirenum and Cimmerium.
10/30/05 22:00 PST. Tak FS128. CM=303.|
Syrtis Major. Hellas not very bright at all, and showing some dark streaks.
8" f/6 dobsonian.|
Can you believe these two were only an hour apart and are showing mostly the same features? The dark smudginess just above center in the early sketch is what later resolves into an obvious Sinus Meridiani.
10/22/05 20:45 PDT. CM=340.|
10/22/05 21:45 PDT. CM=355.|
Much better. Sinus Meridiani, with Margaritifer at right.