▁Sun ). ▁A ub rit es ▁( en stat ite ▁ach ond rite ▁meteor ites ) ▁are ▁believed ▁to ▁come ▁from ▁E - type ▁astero ids , ▁because ▁A ub rit es ▁could ▁be ▁linked ▁to ▁the ▁E - type ▁astero id ▁ 3 1 0 3 ▁E ger . ▁ ▁This ▁grouping ▁may ▁be ▁related ▁to ▁the ▁X e - type ▁of ▁the ▁S MA SS ▁classification . ▁ ▁E - B elt ▁ ▁The ▁E - type ▁astero ids ▁of ▁the ▁Hung aria ▁family ▁are ▁thought ▁to ▁be ▁the ▁remains ▁of ▁the ▁hypoth et ical ▁E - b elt ▁astero id ▁population . ▁ ▁The ▁dispers al ▁of ▁most ▁of ▁that ▁hypoth et ical ▁E - B elt ▁might ▁have ▁been ▁caused ▁by ▁the ▁out wards ▁migration ▁of ▁the ▁gas ▁gi ants ▁of ▁the ▁Sol ar ▁System ▁according ▁to ▁simulations ▁done ▁under ▁the ▁Nice ▁model ▁– ▁and ▁these ▁dispers ed ▁E - B elt ▁astero ids ▁might ▁in ▁turn ▁have ▁been ▁the ▁impact ors ▁of ▁the ▁Late ▁He avy ▁Bomb ard ment . ▁ ▁Ex pl oration ▁On ▁September ▁ 5 , ▁ 2 0 0 8 , ▁E SA ' s ▁robot ic ▁space pro be ▁Ros etta ▁visited ▁the ▁E - type ▁astero id ▁ 2 8 6 7 ▁Š te ins . ▁ ▁Spect ral ▁data ▁from ▁the ▁space craft ▁confirmed ▁the ▁astero id ▁was ▁composed ▁mainly ▁of ▁iron - po or ▁min er als ▁such ▁as ▁en stat ite ▁( m agn es ium - rich ▁py