▁October ▁ 2 0 0 2 , ▁by ▁the ▁L INE AR ▁project ▁at ▁Lincoln ▁Labor atory ' s ▁E TS ▁in ▁Soc or ro , ▁New ▁Mexico . ▁It ▁was ▁announced ▁on ▁ 7 ▁October ▁ 2 0 0 2 ▁and ▁appeared ▁later ▁that ▁day ▁on ▁the ▁J PL ▁current ▁risk ▁page . ▁ ▁Description ▁▁ ▁Due ▁to ▁the ▁proxim ity ▁of ▁its ▁orbit ▁to ▁Earth ▁and ▁its ▁estimated ▁size , ▁this ▁object ▁has ▁been ▁class ified ▁as ▁a ▁potentially ▁ha z ard ous ▁astero id ▁( P HA ) ▁by ▁the ▁Minor ▁Planet ▁Center ▁in ▁Cambridge , ▁Massachusetts . ▁In ▁November ▁ 2 0 0 6 ▁there ▁were ▁ 8 2 3 ▁P H As ▁known . ▁, ▁there ▁are ▁ 1 2 6 1 ▁P H As ▁known . ▁ ▁was ▁removed ▁from ▁the ▁S entry ▁R isk ▁Table ▁on ▁October ▁ 1 0 , ▁ 2 0 0 2 . ▁A ▁Do pp ler ▁observation ▁has ▁helped ▁produce ▁a ▁well ▁known ▁traject ory ▁with ▁a ▁condition ▁code ▁( Un certain ty ▁Parameter ▁U ) ▁of ▁ 0 . ▁ ▁Based ▁on ▁an ▁absolute ▁magnitude ▁( H ) ▁of ▁ 2 0 . 2 , ▁the ▁astero id ▁is ▁estimated ▁to ▁be ▁between ▁ 2 7 0 ▁and ▁ 5 9 0 ▁meters ▁in ▁diameter . ▁Rad ar ▁astronom y ▁shows ▁it ▁is ▁a ▁contact ▁binary ▁astero id ▁with ▁a ▁diameter ▁of ▁ 3 0 0 ▁meters ▁and ▁a ▁rotation ▁period ▁of ▁ 9 . 5 ▁hours . ▁ ▁On