Last night's conditions were about the same as the night before: good enough seeing but with poor transparency. I had hoped to spend time in Monoceros for close doubles, but the haze would have made the faint pairs difficult, so I returned to the moon, still at 553x.
I returned to the same areas I observed the night before. What a difference 24 hours makes in the light angle, and what can be seen (or not seen). The Hortensius Domes disappeared. Promontorium Laplace's shadow was much shorter, and rounder; the hills whose peaks were the only lit feature the night before were now fully exposed to the sun. I could see inside the very rough Maupertuis crater, which has three ridges running in parallel in one half of it.
I looked at a new region now lit up: Crater J. Herschel was lit at a low angle, and is huge with a rough floor. The Jura Mountains were amazingly rugged and detailed. The interior of Sharp was still in shadow, but this helped give shape to the tear-drop crater rim, with a very bright lip along the curved edge of the shape.
I moved up to the Mare Humorum region. Gassendi and its rille were very busy, many features overlapping on each other. The rille fractured into several branches; the crater has a sinuous rim and a multi-tipped central peak; an adjoining crater seemed to spill debris into Gassendi. And there was a fairly large ghost crater on the opposite side from this.
I was just able to glimpse the Herigonius Rille, though it was tough: more a bright streak rather than a depression; it must be narrow and shallow.
The Dopplemayer Rilles were interesting: one long rille running on one side of Mare Humorum then forking into three, maybe four smaller shorter rilles. This was tough but easier than Herigonius Rille.
"The Helmet" is a light colored area of non-mare volcanics, and really does look like a WWII soldier's helmet. Its central part is roughed by craters and domes.
I went looking for Kies Pi Dome but found a similar looking crater -- Mercator -- which had a row of three what I thought were domes arrayed outside of it -- though these might be just hills of the Mercator Scarp.
Further east was Kies, much more ghostly than Mercator. I had a tentative observation of Pi, which was quite small or perhaps just having gently sloping sides -- maybe needed a shallower light angle to see better. Did not see a central pit.
Another fun, but short, night.