← All launches
Launch SuccessfulUnited States Air Force
Thor Delta E1: HEOS 1
HEOS 1 (Highly Eccentric Orbit Satellite) was an earth-orbiting, spin-stabilized satellite that was launched by ESA. The spacecraft objectives were to study interplanetary magnetic fields, cosmic rays, the solar wind, and the magnetosheath.
Thursday, 5 December 1968
Mission Data
🇺🇸United States Air ForceEst. 1947
Launch VehicleThor Delta E1
Vehicle FamilyThor
Vehicle Record16 of 17 launches (94.1%)
Provider TypeGovernment
Agency Record972 successes / 106 failures (90%)
Success Streak68 consecutive
Mission TypeAstrophysics
Target OrbitElliptical Orbit
Launch PadSpace Launch Complex 17B
Location🇺🇸 Cape Canaveral SFS, FL, USA USA
Orbital Launches This Year#121
Agency Launches This Year#37
Launches From This Pad132
Launches From This Site1,132
Status Note
The launch vehicle successfully inserted its payload(s) into the target orbit(s).
About Thor Delta E1
American orbital launch vehicle family with Thor first stage and a delta second stage.
Launch Site
Space Launch Complex 17B · 28.4458°N 80.5657°W
Launch data from Launch Library 2 by The Space Devs.