EntityQ602362· pop 20· linked from 20 articlesPtolemaeusSign in to savelunar impact craterConnectionsPtolemyEntityNASAConceptgeographic coordinate systemEntityInternational Standard Book NumberEntitypolygonEntitydiameterEntitydigital object identifierEntityInternational Astronomical UnionEntityimpact craterEntitybibcodeEntityApollo 12EntityeponymEntityApollo 16EntityCambridge University PressEntityPatrick MooreEntityQ22908627EntityMare ImbriumEntitylunar craterEntity4001 PtolemaeusEntityAlbategniusEntityCategoriesImpact craters on the MoonLQ19 quadranglePtolemy