UNITED STATES AIR FORCE

Thor Agena A | Discoverer 1

FAILURE Thor Agena A →
Feb 28, 1959 at 21:49 UTC
Polar Orbit Government/Top Secret Vandenberg SFB, CA, USA 60% success
Initializing Launch Globe…
Live Orbit
Fullscreen
Mission Control3D trajectory · Live telemetry · AI narrator · Booster tracking
PADSpace Launch Complex 1W
SITEVandenberg SFB, CA, USA →
ORBITPolar Orbit
TYPEGovernment/Top Secret

Discoverer I was the first of a series of satellites part of the CORONA reconnaissance program. This satellite didn’t take a camera or film system as it was intended as a test. There were issues communicating with the satellite during flight with only intermittent signals being read.

MISSION
Discoverer 1
MISSION TYPE
Government/Top Secret
TARGET ORBIT
Polar Orbit
COUNTRY
USA
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: 2e03da7f-8604-416c-9313-8c456d893a6f
Reported date: Feb 28, 1959 at 21:49 UTC
Last synced: 16 minutes ago
This launch date and time are confirmed by the launch provider. Countdown is active.
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MANUFACTURER
McDonnell Douglas
VARIANT
Agena A
FLIGHTS
15
SUCCESSES
9
SUCCESS RATE
60%

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.

When is the Thor Agena A | Discoverer 1 launch?
The Thor Agena A | Discoverer 1 is scheduled for Saturday, February 28, 1959 at 9:49 PM UTC. This is the NET (No Earlier Than) time and may be subject to change. Current status: FAILURE.
What rocket is being used for Discoverer 1?
The Thor Agena A | Discoverer 1 mission uses the Thor Agena A rocket, manufactured by McDonnell Douglas. The Thor Agena A has flown 15 times with a 60% success rate.
Where is the Thor Agena A | Discoverer 1 launching from?
The launch takes place from Space Launch Complex 1W at Vandenberg SFB, CA, USA.
What orbit is Discoverer 1 going to?
The Discoverer 1 mission is targeting Polar Orbit.
Who is launching Discoverer 1?
The Thor Agena A | Discoverer 1 is operated by United States Air Force.
Can I watch the Thor Agena A | Discoverer 1 launch live?
Yes. Visit the launch detail page on Space Launch Live for embedded YouTube webcasts, replay videos, and links to live coverage from SpaceX, NASA, NASASpaceflight, and other channels.
Mar 28, 2026 20:12 UTC
Launch added to tracker
Imported from Launch Library 2 API
Mar 28, 2026 20:12 UTC
Launch date set: Feb 28, 1959 at 21:49 UTC
NET (No Earlier Than) confirmed by United States Air Force
Mar 28, 2026 20:12 UTC
Launch failure reported
Updated via Launch Library 2
Last data sync: 16 minutes ago
Launch Library 216 minutes ago
Launch ID: 2e03da7f-8604-416c-9313-8c456d893a6f
Open-Meteo Weather4 days ago
Pad weather at 34.76, -120.63

Mission Profile

Discoverer 1 was a Thor Agena A mission operated by United States Air Force that lifted off from Space Launch Complex 1W, Vandenberg SFB, CA, USA on February 28, 1959. The flight carried its payload on a government/top secret mission to Polar Orbit. The launch ended in failure.