▁minor ▁planet ▁was ▁named ▁after ▁Spanish ▁conquist ador ▁Pedro ▁de ▁Val div ia ▁( 1 5 0 2 – 1 5 5 3 ), ▁who ▁conquer ed ▁Chile ▁with ▁a ▁small ▁expedition ▁corps ▁after ▁he ▁served ▁under ▁Francisco ▁P izar ro ▁in ▁Peru . ▁Val div ia ▁founded ▁the ▁cities ▁Santiago ▁( 1 5 4 1 ) ▁and ▁Con cep ción ▁( 1 5 5 0 ) ▁and ▁became ▁Chile ' s ▁first ▁royal ▁governor . ▁The ▁city ▁of ▁Val div ia ▁in ▁southern ▁Chile ▁is ▁also ▁named ▁after ▁him . ▁The ▁official ▁naming ▁c itation ▁was ▁published ▁by ▁the ▁Minor ▁Planet ▁Center ▁on ▁ 2 6 ▁March ▁ 1 9 8 6 ▁( ). ▁ ▁Phys ical ▁characteristics ▁ ▁Rot ation ▁period ▁▁ ▁In ▁August ▁ 2 0 1 6 , ▁the ▁so - far ▁best - r ated ▁rot ational ▁light cur ve ▁of ▁Val div ia ▁was ▁obtained ▁by ▁the ▁Spanish ▁amateur ▁astronom er ▁group ▁O B AS . ▁Light cur ve ▁analysis ▁gave ▁a ▁rotation ▁period ▁of ▁ 4 . 0 9 8 ▁hours ▁with ▁a ▁bright ness ▁variation ▁of ▁ 0 . 2 5 ▁magnitude ▁( ). ▁Pre viously , ▁in ▁May ▁ 2 0 0 3 , ▁phot ometric ▁observations ▁made ▁by ▁Donald ▁P . ▁P ray ▁at ▁the ▁Car b un cle ▁Hill ▁Observ atory ▁ ▁near ▁Prov idence , ▁Rh ode ▁Island , ▁gave ▁a ▁syn od ic ▁period ▁of ▁ 4 . 0 9 6 ▁hours ▁and ▁an ▁amplitude ▁of ▁ 0 . 4