Space Shuttle STS-51 Discovery ACTS pt1-2 Post Flight Press 1993 NASA
1993: Space Shuttle Flight 57 (STS-51) - Discovery (NASA)
It was the 50th shuttle mission. The flight featured the deployment of ACTS and SPAS-ORFEUS satellites. The latter was equipped with IMAX camera, which captured a footage of Discovery in space. The mission also included spacewalk as a training for Hubble Space Telescope servicing flight planned later during the year.