Thor Delta C | Explorer 28
Launch Successful
L - -- : -- : -- : --
Instantaneous launch window.
Launch Window
May 29, 1965, noon - May 29, 1965, noon
Instantaneous launch window.
May 29, 1965, noon - May 29, 1965, noon
Explorer 28 (IMP 3) 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.
American orbital launch vehicle family with Thor first stage and a delta second stage.
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5 prototype satellites for Low Earth Orbit communications satellite constellation testing, in 3 different orbits.
A batch of 23 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.