▁February ▁ 2 0 1 6 . ▁, ▁the ▁astero id ▁is ▁estimated ▁to ▁be ▁ ▁from ▁Earth . ▁Per i hel ion ▁( clos est ▁approach ▁to ▁the ▁Sun ) ▁may ▁not ▁occur ▁again ▁until ▁August ▁ 2 0 2 1 . ▁ ▁Or bits ▁computed ▁with ▁only ▁a ▁hand ful ▁of ▁observations ▁can ▁be ▁un re li able . ▁Short ▁observation ▁ar cs ▁can ▁result ▁in ▁computer ▁generated ▁or bits ▁reject ing ▁some ▁data ▁unnecess arily . ▁The ▁ 2 0 1 8 ▁J PL ▁orbit ▁determ ination ▁shows ▁a ▁semi - major ▁axis ▁of ▁ 4 . 9 ▁A U ▁( al beit ▁with ▁a ▁large ▁ 2 0   AU ▁uncertainty ) ▁which ▁would ▁be ▁near ▁Jup iter ' s ▁orbit . ▁Such ▁an ▁orbit ▁would ▁be ▁un stable ▁unless ▁it ▁was ▁a ▁Jup iter ▁tro jan . ▁Jup iter ▁tro j ans ▁have ▁( 4 . 6 ▁A U ▁< ▁semi - major ▁axis ▁< ▁ 5 . 5 ▁A U ; ▁ecc ent ric ity ▁< ▁ 0 . 3 ). ▁The ▁nom inal ▁semi - major ▁axis ▁of ▁ ▁is ▁just ▁outside ▁of ▁the ▁astero id ▁bel t . ▁As ▁more ▁observations ▁come ▁in , ▁it ▁is ▁expected ▁the ▁orbit ▁determ ination ▁will ▁be ▁that ▁of ▁a ▁main ▁bel t ▁astero id ▁as ▁they ▁are ▁by ▁far ▁the ▁most ▁numerous ▁discovered ▁objects ▁in ▁the ▁solar ▁system ▁and ▁account ▁for ▁ 9 4 % ▁of ▁all ▁known ▁Small ▁Sol ar ▁System ▁bodies . ▁Out er ▁main ▁bel