UNITED STATES AIR FORCE
Thor SLV-2 Agena B | Echo 2
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Jan 25, 1964 at 13:59 UTC
▸ Flight profile›
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MISSION OVERVIEW
The Echo 2 spacecraft was a 41-m balloon of aluminum foil-mylar laminate. Echo 2 was designed as a rigidized passive communications spacecraft for testing propagation, tracking, and communication techniques.
LAUNCH DETAILS
VEHICLE
Thor SLV-2 Agena BAGENCY
United States Air ForceMISSION
Echo 2
MISSION TYPE
Communications
TARGET ORBIT
Low Earth Orbit
LAUNCH PAD
Space Launch Complex 2ELAUNCH SITE
Vandenberg SFB, CA, USACOUNTRY
USA
LAUNCH TIME VERIFICATION
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: f023ec2a-a408-44cc-9360-4f8744e06e99
Reported date: Jan 25, 1964 at 13:59 UTC
Last synced: 7 minutes ago
This launch date and time are confirmed by the launch provider. Countdown is active.
LAUNCH MAP
PAD WEATHER
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VEHICLE — Thor SLV-2 Agena B →
MANUFACTURER
McDonnell Douglas
VARIANT
SLV-2 Agena B
FLIGHTS
3
SUCCESSES
3
SUCCESS RATE
100%
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.
FREQUENTLY ASKED QUESTIONS
When is the Thor SLV-2 Agena B | Echo 2 launch?
The Thor SLV-2 Agena B | Echo 2 is scheduled for Saturday, January 25, 1964 at 1:59 PM UTC. This is the NET (No Earlier Than) time and may be subject to change. Current status: SUCCESS.
What rocket is being used for Echo 2?
The Thor SLV-2 Agena B | Echo 2 mission uses the Thor SLV-2 Agena B rocket, manufactured by McDonnell Douglas. The Thor SLV-2 Agena B has flown 3 times with a 100% success rate.
Where is the Thor SLV-2 Agena B | Echo 2 launching from?
The launch takes place from Space Launch Complex 2E at Vandenberg SFB, CA, USA.
What orbit is Echo 2 going to?
The Echo 2 mission is targeting Low Earth Orbit.
Who is launching Echo 2?
The Thor SLV-2 Agena B | Echo 2 is operated by United States Air Force.
Can I watch the Thor SLV-2 Agena B | Echo 2 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.
LAUNCH TIMELINE
Mar 28, 2026 20:13 UTC
Launch added to tracker
Imported from Launch Library 2 API
Mar 28, 2026 20:13 UTC
Launch date set: Jan 25, 1964 at 13:59 UTC
NET (No Earlier Than) confirmed by United States Air Force
Mar 28, 2026 20:13 UTC
Launch completed successfully
Updated via Launch Library 2
LIVE DATA SOURCES
Last data sync: 7 minutes ago
●Launch Library 27 minutes ago
Launch ID: f023ec2a-a408-44cc-9360-4f8744e06e99
●Open-Meteo Weather1 week ago
Pad weather at 34.75, -120.62
Mission Profile
Echo 2 was a Thor SLV-2 Agena B mission operated by United States Air Force that lifted off from Space Launch Complex 2E, Vandenberg SFB, CA, USA on January 25, 1964. The flight carried its payload on a communications mission to Low Earth Orbit. The launch was a success.