1 1 ▁of ▁the ▁ 1 4 ▁observations ▁and ▁listed ▁ ▁as ▁a ▁Mars - c ros ser ▁with ▁peri hel ion ▁( clos est ▁approach ▁to ▁the ▁Sun ) ▁at ▁ 1 . 3 7 ▁A U . ▁▁ 2 0 1 8 ▁orbit ▁solution ▁ ▁In ▁February ▁ 2 0 1 8 , ▁the ▁NE OW I SE ▁team ▁re anal yz ed ▁their ▁data ▁and ▁found ▁an ▁additional ▁detection ▁from ▁ 5 ▁April ▁ 2 0 1 0 ▁that ▁extended ▁the ▁observation ▁arc ▁by ▁about ▁three ▁hours . ▁This ▁new ▁observation ▁resulted ▁in ▁the ▁J PL ▁Small - Body ▁Database ▁lif ting ▁the ▁nom inal ▁peri hel ion ▁( clos est ▁approach ▁to ▁the ▁Sun ) ▁from ▁ 1 . 2   AU ▁to ▁ 2 . 2   AU . ▁Using ▁the ▁still ▁poor ly ▁const rained ▁ 2 1 ▁February ▁ 2 0 1 8 ▁orbit ▁solution , ▁J PL ▁Hor iz ons ▁shows ▁that ▁on ▁the ▁discovery ▁date ▁of ▁ 5 ▁April ▁ 2 0 1 0 ▁the ▁astero id ▁is ▁estimated ▁to ▁have ▁been ▁ ▁from ▁Earth ▁with ▁an ▁uncertainty ▁in ▁the ▁astero id ' s ▁distance ▁of ▁ ± 3 5 0 ▁million ▁km ▁and ▁moving ▁away ▁from ▁Earth ▁at ▁. ▁Per i hel ion ▁( clos est ▁approach ▁to ▁the ▁Sun ) ▁is ▁estimated ▁to ▁have ▁occurred ▁around ▁September ▁ 2 0 1 0 . ▁A ph el ion ▁( fur th est ▁distance ▁from ▁the ▁Sun ) ▁is ▁estimated ▁to ▁have ▁occurred ▁around