rid ium ▁ 3 3 ▁coll ided , ▁resulting ▁in ▁the ▁destruction ▁of ▁both ▁space craft . ▁NASA ▁reported ▁that ▁a ▁large ▁amount ▁of ▁space ▁de br is ▁was ▁produced ▁by ▁the ▁collision . ▁ ▁References ▁ ▁Category : Comm unic ations ▁sat ell ites ▁in ▁low ▁Earth ▁orbit ▁Category : 2 0 0 9 ▁in ▁space fl ight ▁Category : S at ellite ▁coll isions ▁Category : Art ific ial ▁sat ell ites ▁formerly ▁orbit ing ▁Earth ▁Category : Space craft ▁launched ▁in ▁ 1 9 9 7 ▁Category : I rid ium ▁sat ell ites <0x0A> </s> ▁The ▁Hub bal li ▁- ▁Sec under abad ▁Express ▁is ▁an ▁express ▁train ▁belonging ▁to ▁South ▁Western ▁Railway ▁zone ▁that ▁runs ▁between ▁Hub li ▁J unction ▁and ▁Sec under abad ▁J unction ▁in ▁India . ▁It ▁is ▁currently ▁being ▁operated ▁with ▁ 1 7 3 2 0 / 1 7 3 1 9 ▁train ▁numbers ▁on ▁daily ▁basis . ▁ ▁Service ▁ ▁The ▁ 1 7 3 1 9 / Hub bal li ▁- ▁Sec under abad ▁Express ▁has ▁aver ages ▁speed ▁of ▁ 4 4   km / hr ▁and ▁covers ▁ 6 6 2   km ▁in ▁ 1 4 h ▁ 5 5 m . ▁The ▁ 1 7 3 2 0 / Sec under abad ▁- ▁Hub bal li ▁Express ▁has ▁aver ages ▁speed ▁of ▁ 4 2   km / hr ▁and ▁covers ▁ 6 6 2   km ▁in ▁ 1 5 h ▁ 5 0 m .