Nice evening for planet observations, it was partly cloudy, 84°F ( 29°C),with average seeing and below average transparency due to high altitude smoke from distant fires. The central meridian of Mars at the time of sketching was between 50 -60 degrees. Mars was very bright ( visual magnitude -2.4) and its angular size was nearly 22 seconds of arc. The phase of Mars was nearly 98% illuminated.
Features seen included the south polar cap, Argyre I, Mare Erythraeum, Aurorae Sinus, Nectar and Melas Lacus and the ‘location’ of Valles Mariner is between them. Solis Lacus was well over to the following limb. To the north some of Niliacus Lacus could be seen and the bright haze near the north polar region.
I ended up sketching without a filter but I used an assortment of color filters, a polarizing, and a neodymium filter to increase contrast when I began observing.
Sketch and Equipment
Sketch using graphite and assorted color pencils, blending stumps, white Pearl eraser on white copy paper, dark background created using Gimp 2.8
Temperature: 29ᵒ C (84ᵒ F) skies hazy, no wind
Equipment Used: 16” f/4.41 Dobsonian on an equatorial platform 7.5 mm, eyepiece (239x)
9mm eyepiece with barlow for closer looks (398x)