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Launch FailureUnited States Air Force
Thor Agena A: Discoverer 12
Discoverer 12 was an American optical reconnaissance satellite. The fourth of five test flights of the Corona KH-1 spy satellite series. It was lost when the second stage failed during launch.
Wednesday, 29 June 1960
Thor Agena A
Mission Data
🇺🇸United States Air ForceEst. 1947
Launch VehicleThor Agena A
Vehicle FamilyThor
Vehicle Record9 of 15 launches (60%)
Provider TypeGovernment
Agency Record972 successes / 106 failures (90%)
Success Streak68 consecutive
Mission TypeGovernment/Top Secret
Target OrbitLow Earth Orbit
Launch PadSpace Launch Complex 1W
Location🇺🇸 Vandenberg SFB, CA, USA USA
Orbital Launches This Year#15
Agency Launches This Year#11
Launches From This Pad56
Launches From This Site923
Status Note
Either the launch vehicle did not reach orbit, or the payload(s) failed to separate.
About Thor Agena A
Thor-Agena was a series of orbital launch vehicles. The rockets used Thor first stages and Agena second stages. They are thus cousins of the more-famous Thor-Deltas, which founded the Delta rocket family.
Launch Site
Space Launch Complex 1W · 34.7572°N 120.6303°W
Launch data from Launch Library 2 by The Space Devs.