Discoverer 12
Thor Agena A
United States Air Force
Launch Status
FailureMission
Discoverer 12
Type: Government/Top Secret
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.
Trajectory
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Location
Space Launch Complex 1W
Vandenberg SFB, CA, USA
719 rockets have launched from Vandenberg SFB, CA, USA.

Rocket
Thor Agena A – McDonnell Douglas
- Family: Thor
- Length: 28 m
- Diameter: 2.44 m
- Launch Mass: 53 T
- Low Earth Orbit Capacity: 250 kg
The Thor Agena A was manufactured by McDonnell Douglas with the first launch on 1959-01-21. Thor Agena A has 9 successful launches and 6 failed launches with a total of 15 launches. 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.
Agency
United States Air Force – USAF
- Type: Government
- Abbreviation: USAF
- Country: USA