Discoverer 4 (Corona 9001 / KH-1 1), the first operational Corona film-return photoreconnaissance satellite, launched on a Thor Agena-A from Vandenberg on 25 June 1959. Agena second-stage velocity was insufficient and the first camera-equipped KH-1 failed to reach orbit.
- Outcome
- Failure
- Orbit
- PO
- Polar orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 4th
- of 15 Thor Agena A flights
- Date and time
- 25 June 1959, 22:47 UTC
- Rocket
- Thor Agena A
- Builder
- McDonnell Douglas
- Launch site
- Space Launch Complex 1E, Vandenberg SFB, CA, USA
- Payload
- Government/Top Secret
- Launches in 1959
- 10th of 23