Ptolemaeus Imaged 09-14-06,
18 Inch Reflector , Infinity 2-1M Camera
The Information Listed Below Is
Provided By Personal Authorization From Christian Legrand Of VMA,
To Virtual Moon Atlas
Circular formation forming a remarkable trio with Alphonsus and
Few steep slopes riddled by many craterlets and supporting a chain
of craterlets to the North-East.
Very large flat floor containing Ammonius and several ghost craters.
Craterlets depressions and hills.
Dimension: 158x158Km / 93x93Mi
Height/Wide ratio: 0.0157
Interest : Exceptional formation
Observation period: First Quarter or 6 days after Full Moon
Minimal Instrument: 10x binoculars