Le Monnier is the remnant of a lunar impact crater that has been partly inundated by lava flows. It was named after French astronomer Pierre Charles Le Monnier. It is located on the eastern edge of Mare Serenitatis, and the western part of the rim is missing so that it now forms a large bay. To the north is the crater Chacornac.
Lunar Orbiter 4 image
Selenochromatic Image (Si) of crater area (crater to the bottom right)
Oblique Apollo 17 image of Le Monnier
Pierre Charles Le Monnier
Pierre Charles Le Monnier was a French astronomer. His name is sometimes given as Lemonnier.
Latin and French inscriptions at the base of the obelisk of the Gnomon of Saint-Sulpice in Paris, mentioning Pierre Charles Claude Le Monnier above right
Astronomical quarter-circle wall quadrant or mural quadrant (rotatable by 180 °) built by John Bird. Le Monnier adapted and used a version in 1774.