Discoverer 3, the third Corona KH-1 test flight and first Discoverer planned with live animal passengers (four mice), launched on a Thor Agena-A from Vandenberg on 3 June 1959. After stage separation the Agena pitched down and crashed into the Pacific; no orbit was achieved.
- Outcome
- Failure
- Orbit
- PO
- Polar orbit
- Payload to orbit
- Did not reach orbit
- Flight
- 3rd
- of 15 Thor Agena A flights
- Date and time
- 3 June 1959, 20:09 UTC
- Rocket
- Thor Agena A
- Builder
- McDonnell Douglas
- Launch site
- Space Launch Complex 1W, Vandenberg SFB, CA, USA
- Payload
- Government/Top Secret
- Launches in 1959
- 7th of 23