▁ch ains ▁radial ▁to ▁large ▁cr aters . ▁ ▁C rat ers ▁within ▁the ▁K ui per ▁quad rangle ▁increase ▁in ▁complexity ▁as ▁they ▁increase ▁in ▁size ▁from ▁simple ▁bow l - sh aped ▁cr aters ▁to ▁complex ▁cr aters ▁with ▁central ▁pe aks ▁to ▁mult iring ed ▁bas ins . ▁K ui per ▁( 1 1 ° ▁S ., ▁ 3 1 . 5 ° ) ▁is ▁a ▁moder ate - size ▁cr ater ▁with ▁a ▁central ▁peak ▁cluster ; ▁Brun ell esch i ▁( 9 ° ▁S ., ▁ 2 2 . 5 ° ) ▁exhib its ▁an ▁incomplete ▁ring ▁of ▁pe aks ; ▁and ▁Rod in ▁( 2 2 ° ▁N ., ▁ 1 8 ° ) ▁is ▁a ▁well - develop ed ▁double - ring ed ▁bas in . ▁These ▁three ▁cr aters ▁are ▁mer cur ian ▁counter parts ▁in ▁morph ology ▁to ▁the ▁lun ar ▁cr aters ▁Cop ern icus , ▁Com pton ▁( or ▁Anton i adi ), ▁and ▁Sch r öd inger . ▁All ▁cr aters ▁larger ▁than ▁about ▁ 3 5   km ▁diameter ▁and ▁bas ins ▁are ▁filled ▁to ▁some ▁extent ▁with ▁pla ins ▁materials , ▁and ▁exposed ▁r ims ▁of ▁partly ▁buried ▁cr aters ▁within ▁the ▁bas ins ▁indicate ▁that ▁the ▁fill ▁is ▁about ▁ 7 0 0 ▁to ▁ 1 0 0 0 ▁m ▁thick ▁( De ▁Hon ▁and ▁W ask om , ▁ 1 9 7 6 ). ▁ ▁Six ▁bas ins ▁r anging ▁in ▁age ▁from ▁cl ▁to ▁c 3