In March 2020, I managed to observe several craters due to favorable lunar libration. Normally, they would be too close to the limb of the Moon. These craters are Inghirami, Pingré, Casatus, and Boguslawky. Observing plan courtesy of Sky and Telescope!
Lunar libration is the perceived wobbling of the Moon due to changes in our perspective as the Moon travels on its elliptical orbit. We can therefore observe 59% of the surface of the Moon in total. Wikipedia has a nice animation of this motion.
Libration is complex and I believe the pattern repeats after around 6 years, though I am not entirely certain. Hence, there are new lunar sights to hunt for every month!
Inghirami
Crater Inghirami is an isolated circular formation with steep slopes and high walls. It has a very uneven floor with central mountains and craterlets. It also appears to have some crests or fault lines running through it.
The nearby Wargentin caught my attention as it is a heightened circular formation with a very flat floor. The shadows on the crater wall next to the adjacent Nasmyth give some indication of steep slope on that side, but the crater is otherwise without walls. The floor was filled with lava and formed a plateau.
Pingré
Crater Pingré is an isolated circular formation with steep slopes with many craters on the south-eastern side. There appear to be craterlets within the crater as well.
Casatus
The crater Casatus is a circular formation forming a double crater with Klaproth. Klaproth is not clear in the image as there were few shadows to highlight its shape.
Casatus has steep slopes and a flat floor, both marked by several craterlets. Klaproth has a very flat floor, too, that is separated from Casatus by a ridge.
Bogulawsky
Bogulawsky is a circular formation with steep slopes. There are many adjacent craters in the area. Its western wall seems to be riddled with a number of craterlets and there is a prominent one on the east side. A few hills mark the relatively flat crater floor.