Very dark circular formation resembling to a sea.
Steep slopes supporting many craterlets whose Grimaldi K L M N and
P to the South Grimaldi D E and Q to the North-East and Rimae Grimaldi
to the South-East.
Few high walls ridden by Grimaldi B to the North.
Very large and flat floor filled somber lava. Small relief to the
North-East. Craterlets and clear bands.
Dimension: 228x228Km / 134x134Mi
Height/Wide ratio: 0.009
Interest : Exceptional formation
Observation period: 6 days after First Quarter or 5 days after Last
Minimal Instrument: 10x binoculars