American orbital launch vehicle family with Thor first stage and a delta second stage.
None
Explorer 18 (IMP 1, Interplanetary Monitoring Platform) was a solar-cell and chemical-battery powered spacecraft instrumented for interplanetary and distant magnetospheric studies of energetic particles, cosmic rays, magnetic fields, and plasmas.
Elliptical OrbitA batch of 28 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Progress resupply mission to the International Space Station.
Satellite officially named for "space environment detection" purposes, exact details unknown.
A batch of 27 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Second of EUMETSAT's third generation of weather satellite.