cell ar um , ▁which ▁is ▁named ▁after ▁British ▁astronom er ▁John ▁Fl am ste ed . ▁It ▁lies ▁almost ▁due ▁east ▁of ▁the ▁dark - h ued ▁Gr im ald i , ▁and ▁north - n orth west ▁of ▁the ▁flo oded ▁Let ron ne ▁bay ▁on ▁the ▁south ▁edge ▁of ▁the ▁mare . ▁ ▁The ▁rim ▁of ▁this ▁cr ater ▁is ▁not ▁circular ▁in ▁form , ▁having ▁a ▁bul ging ▁rim ▁to ▁the ▁sout heast . ▁The ▁interior ▁is ▁relatively ▁flat ▁and ▁und ist ingu ished ▁by ▁impact s . ▁The ▁cr ater ▁lies ▁within ▁the ▁southern ▁rim ▁of ▁a ▁cr ater ▁that ▁has ▁been ▁almost ▁completely ▁sub mer ged ▁by ▁the ▁bas alt ic ▁la va ▁flows ▁that ▁formed ▁the ▁Ocean us ▁Pro cell ar um . ▁All ▁that ▁remains ▁of ▁this ▁feature ▁designated ▁Fl am ste ed ▁P ▁are ▁some ▁low ▁rid ges ▁and ▁hills ▁arranged ▁in ▁a ▁circular ▁formation . ▁ ▁The ▁Survey or ▁ 1 ▁craft ▁land ed ▁within ▁the ▁n ortheast ▁rim ▁of ▁the ▁buried ▁Fl am ste ed ▁P ▁feature , ▁about ▁ 5 0 ▁kilom eters ▁north - n ortheast ▁of ▁the ▁Fl am ste ed ▁cr ater ▁rim . ▁ ▁Sat ellite ▁cr aters ▁By ▁convention ▁these ▁features ▁are ▁identified ▁on ▁lun ar ▁maps ▁by ▁placing ▁the ▁letter ▁on ▁the ▁side ▁of ▁the ▁cr ater ▁mid point ▁that ▁is ▁closest ▁to ▁Fl am ste ed . ▁ ▁References ▁ ▁External ▁links ▁ ▁L un ar ▁Or b iter ▁ 1 ▁photo ▁ 1