United States Air ForceThor Agena ASpace Launch Complex 1E, Vandenberg SFB, CA, USA
Discoverer 4
Launched
June 25, 1959
Image: USAF
Summary
Discoverer 4 launched on an United States Air Force Thor Agena A from Space Launch Complex 1E, Vandenberg SFB, CA, USA on June 25, 1959. The mission failed. It was United States Air Force's 4th launch, 4th this year and humanity's 41st orbital launch attempt. It was the 4th Thor Agena A flight. The payload was bound for Polar Orbit (PO).
- Watch
- No webcast on record.
- Vehicle
- Thor Agena A · United States Air Force
- Booster
- No booster details on record.
- Mission
- Government/Top Secret · Polar Orbit (PO)
- Milestone
- 4th Thor Agena A flightUnited States Air Force's 4th launch4th this yearhumanity's 41st orbital launch attempt10th orbital launch attempt this year
Flight preview
About this launch
Discoverer 4 was the fourth in a series of reconnaissance satellites, however, it failed to reach orbit when the Agena engine underperformed and failed to place the capsule into orbit.
Pad

Space Launch Complex 1E, Vandenberg SFB, CA, USA
1st launch from Space Launch Complex 1E, 1st this year · 4th from Vandenberg SFB, CA, USA
45 launches from this pad · 919 from Vandenberg SFB, CA, USA
under an hour after the previous launch from this pad
Questions
When did Discoverer 4 launch?
Discoverer 4 launched on June 25, 1959. The time is known to the hour, not the minute.
Where can I watch Discoverer 4?
No webcast is on record for this launch.
What rocket launched Discoverer 4?
Thor Agena A, flown by United States Air Force. Thor Agena A spec sheet
Where did Discoverer 4 launch from?
Space Launch Complex 1E, Vandenberg SFB, CA, USA.
What orbit was Discoverer 4 going to?
Polar Orbit (PO), a government/top secret mission.
