▁forward ▁with ▁ST S - 1 3 5 , ▁though ▁without ▁specific ▁fund ing . ▁Gener ally , ▁the ▁average ▁cost ▁of ▁a ▁sh utt le ▁mission ▁was ▁about ▁$ 4 5 0 ▁million . ▁ ▁On ▁ 2 0 ▁January ▁ 2 0 1 1 , ▁ST S - 1 3 5 ' s ▁design ation ▁was ▁officially ▁changed ▁from ▁ST S - 3 3 5 . ▁On ▁ 1 4 ▁February ▁ 2 0 1 1 , ▁NASA ▁man agers ▁announced ▁that ▁ST S - 1 3 5 ▁would ▁fly ▁regardless ▁of ▁the ▁fund ing ▁situation ▁in ▁Congress . ▁ ▁Mission ▁parameters ▁ ▁Mass : ▁ ▁Total ▁lif to ff ▁weight : ▁▁ ▁Or b iter ▁lif to ff ▁weight : ▁▁ ▁Or b iter ▁landing ▁weight : ▁▁ ▁Pay load ▁weight : ▁▁ ▁Per ige e : ▁T BD ▁ ▁Ap og ee : ▁T BD ▁ ▁In cl ination : ▁ 5 1 . 6 ° ▁ ▁Period : ▁ 9 1 ▁minutes ▁ ▁Mission ▁mil est ones ▁The ▁mission ▁marked : ▁▁ 1 6 6 th ▁NASA ▁cre wed ▁space ▁flight ▁▁ 1 3 5 th ▁sh utt le ▁mission ▁since ▁ST S - 1 ▁▁ 3 3 rd ▁flight ▁of ▁Atl ant is ▁▁ 3 rd ▁sh utt le ▁flight ▁in ▁ 2 0 1 1 ▁▁ 3 7 th ▁sh utt le ▁mission ▁to ▁the ▁I SS ▁▁ 1 1 0 th ▁post - Ch allen ger ▁dis aster ▁sh utt le ▁mission ▁▁ 2 2