Versions
- Thor-Agena-A
- 16 launches between 21 Jan 1959 and 13 Sep 1960
- The Discoverer 14 satellite used in the Corona spy satellite program was launched by a Thor-Agena-A. On 1960-08-19 usable photographic film from the satellite was recovered by a C-119 recovery aircraft. This was the first successful recovery of film from an orbiting satellite and the first mid-air recovery of an object returning from Earth orbit.
- Thor-Agena-B
- First successful launch: Nov 12, 1960 with Discoverer 17
- Last launch: May 15, 1966 with Nimbus 2
- Thor-Agena-D
- First launch: Jun 28, 1962
- Last launch: Jan 17, 1968
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