STS-41-D/SBS-4/Telstar 302/Syncom-IV 2

(TW: Lag on some mobile devices because of high part count) This was the maiden flight of Discovery and the highest amount of satellites deployed by a single shuttle. It had 3 satellites, SBS-4, Telstar 302 and Syncom-IV-2. SBS-4 was the 2nd Satellite Business Systems satellite deployed by the shuttle. Telstar 302 was a satellite for AT&T that looks like SBS-4 because it used the same bus as SBS-4. Syncom-IV 2 was the first satellite to deploy exclusively from the shuttle. The first Syncom-IV satellite launched instead on STS-51-A. The Syncom-IV satellite was also named Leasat F2 because it was "leased" to the US military. The satellite was a successor to the 1st satellite that entered geostationary orbit, Syncom 2. The shuttle also included a prototype solar panel that can extend and retract multiple times and also eventually became the basis of the main solar panels on the ISS.