We see in these images an area of the west side of the Moon where the crater Grimaldi (430 km) takes its deserved place among the craters with which can not be compared because of its large size. Located on the western edge of Oceanus Procellarum basin, Grimaldi is laced around the edges in contrast with darker smooth floor, flooded by lava in the past.
The Moon Terminator stops right at its western edge, leaving however be noted sunlight the western interior wall.
Grimaldi is rather a flooded basin of lava, and has a round not oval shape as seen from Earth because it is located on the Moon's edge. Its margin does not have ordinary walls like other craters, but is so destroyed that was transformed into hills and irregular peaks.
In the picture below are labeled craters and other lunar features in the region. To better understand this photo, you should note that the label with the name or the letter of larger craters could be found at their center, and on the small craters, you should find them around them, usually above.
Phase: 70.5% (0% = new, 100% = full)
Distance: 398.311 km
Sidereal Period: 27.32 days
Optics: Celestron C8-Newtonian telescope, plossl 20mm, 2x Barlow
Mount: CG5 (EQ5)
Camera: Sony CX130
Location: Baia Mare, Romania
Processing: FastStone Image Viewer