1 5 , ▁it ▁has ▁been ▁observed ▁ 3 9 ▁times ▁with ▁an ▁observation ▁arc ▁of ▁ 3 8 1 ▁days . ▁ ▁Or bit ▁and ▁orb ital ▁evolution ▁▁▁ ▁is ▁currently ▁an ▁A ten ▁astero id ▁( E arth - cross ing ▁but ▁with ▁a ▁period ▁less ▁than ▁a ▁year ). ▁Its ▁semi - major ▁axis ▁( current ly ▁ 0 . 9 9 9 4   AU ) ▁is ▁similar ▁to ▁that ▁of ▁Earth ▁( 0 . 9 9 9 2   AU ), ▁but ▁it ▁has ▁a ▁relatively ▁high ▁ecc ent ric ity ▁( 0 . 4 6 0 7 ) ▁and ▁moder ate ▁orb ital ▁incl ination ▁( 1 0 . 1 9 1 0 ° ). ▁Gra v it ational ▁interaction ▁with ▁Earth ▁causes ▁its ▁orbit ▁to ▁change ▁so ▁that ▁its ▁average ▁period ▁is ▁one ▁year ▁( This ▁means ▁it ▁altern ates ▁between ▁being ▁an ▁A ten ▁astero id ▁and ▁being ▁an ▁Apol lo ▁astero id .) ▁Its ▁mean ▁longitude ▁( around ▁the ▁Sun ) ▁is ▁similar ▁to ▁that ▁of ▁Earth , ▁which ▁means ▁that ▁it ▁is ▁fairly ▁close ▁to ▁Earth ▁( less ▁than ▁about ▁ 1 . 5   AU ). ▁This ▁makes ▁it ▁a ▁quasi - s at ellite . ▁It ▁moves ▁in ▁a ▁kid ney - sh aped ▁path ▁going ▁from ▁east ▁to ▁west ▁relative ▁to ▁Earth ▁(" ret ro grade ", ▁the ▁opposite ▁way ▁from ▁the ▁Moon ). ▁The ▁relative ▁mean ▁longitude ▁compared ▁to ▁Earth ▁( that ▁is , ▁its ▁mean ▁longitude ▁minus ▁that