. ▁Following ▁ 7 9 ▁or bits , ▁the ▁mission ▁concluded ▁on ▁ 2 7 ▁November ▁ 1 9 8 9 , ▁with ▁a ▁landing ▁at ▁sun set ▁on ▁Run way ▁ 0 4 ▁at ▁Edwards ▁Air ▁Force ▁Base , ▁California . ▁Mission ▁duration ▁was ▁ 5 ▁days , ▁ 7 ▁minutes , ▁ 3 2 ▁seconds . ▁ ▁ST S - 4 4 ▁ ▁ST S - 4 4 ▁also ▁launched ▁at ▁night ▁on ▁ 2 4 ▁November ▁ 1 9 9 1 . ▁The ▁primary ▁mission ▁objective ▁was ▁accomplished ▁with ▁the ▁successful ▁deployment ▁of ▁a ▁Def ense ▁Support ▁Program ▁( D SP ) ▁satellite ▁with ▁an ▁In ert ial ▁Upper ▁Stage ▁( I US ) ▁ro cket ▁boost er . ▁In ▁addition ▁the ▁crew ▁also ▁conducted ▁two ▁Military ▁Man ▁in ▁Space ▁Exper iments , ▁three ▁radiation ▁monitoring ▁experiments , ▁and ▁numerous ▁medical ▁tests ▁to ▁support ▁longer ▁duration ▁Sh utt le ▁fl ights . ▁The ▁mission ▁was ▁concluded ▁in ▁ 1 1 0 ▁or bits ▁of ▁the ▁Earth ▁with ▁Atl ant is ▁returning ▁to ▁a ▁landing ▁on ▁the ▁lake bed ▁at ▁Edwards ▁Air ▁Force ▁Base , ▁California , ▁on ▁ 1 ▁December ▁ 1 9 9 1 . ▁Mission ▁duration ▁was ▁ 6 ▁days , ▁ 2 2 ▁hours , ▁ 5 0 ▁minutes , ▁ 4 2 ▁seconds . ▁ ▁ST S - 6 1 ▁ ▁ST S - 6 1 ▁was ▁the ▁first ▁Hub ble ▁Space ▁T eles cope ▁( H ST ) ▁serv icing ▁and ▁repair ▁mission . ▁