λ=240ﾟLs,   (ω=226°W,   φ=20°S),   δ=24.1",   ι=17°

Note:
  Seeing 6 out of 10, with moments of 8 out of 10. On the heels of a late night thunderstorm, very humid, quite warm. Scope wasn't uncovered until right before observation. Still air, high, thin clouds drifting in front of Mars. Observed until the planet was blocked by the Silver Maple tree.
  Very much struck by how dark Mare Cimmerium and Mare Sirenum were ... the darkest markings I've seen this season. Much, much detail in both MS and MC. Especially looked for and saw the two northward pointing dark markings from MC during moments of good seeing. Sytris Major and Hellas on the following limb had a surprising amount of detail. Marking in the following north might be Nodus Alcyonius. Other northern marking is Elysium. South Polar Cap was loaded with detail; the most detail I've seen in a Martian polar cap. Mostly done with W25 (red) filter. Bright North Polar Hood; brighter then last week, but about the same size. 20-inch (TJ) stopped down to 17-inches.

43cm f /7.8 reflector,480-680x

Bowie, MD USA.