UNITED STATES AIR FORCE
Thor Delta B | Relay 2
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Jan 21, 1964 at 21:14 UTC
▸ Flight profile›
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MISSION OVERVIEW
Relay 2, although principally a communications satellite, carried particle experiments designed to map the trapped radiation belt.
LAUNCH DETAILS
VEHICLE
Thor Delta BAGENCY
United States Air ForceMISSION
Relay 2
MISSION TYPE
Communications
TARGET ORBIT
Elliptical Orbit
LAUNCH PAD
Space Launch Complex 17BLAUNCH SITE
Cape Canaveral SFS, FL, USACOUNTRY
USA
LAUNCH TIME VERIFICATION
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: a6489b52-40b8-49cb-8fdb-9fd7ca6ae2cd
Reported date: Jan 21, 1964 at 21:14 UTC
Last synced: 14 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 Delta B →
MANUFACTURER
McDonnell Douglas
VARIANT
Delta B
FLIGHTS
9
SUCCESSES
8
SUCCESS RATE
88.9%
American orbital launch vehicle family with Thor first stage and a delta second stage.
FREQUENTLY ASKED QUESTIONS
When is the Thor Delta B | Relay 2 launch?
The Thor Delta B | Relay 2 is scheduled for Tuesday, January 21, 1964 at 9:14 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 Relay 2?
The Thor Delta B | Relay 2 mission uses the Thor Delta B rocket, manufactured by McDonnell Douglas. The Thor Delta B has flown 9 times with a 88.9% success rate.
Where is the Thor Delta B | Relay 2 launching from?
The launch takes place from Space Launch Complex 17B at Cape Canaveral SFS, FL, USA.
What orbit is Relay 2 going to?
The Relay 2 mission is targeting Elliptical Orbit.
Who is launching Relay 2?
The Thor Delta B | Relay 2 is operated by United States Air Force.
Can I watch the Thor Delta B | Relay 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 21, 1964 at 21:14 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: 14 minutes ago
●Launch Library 214 minutes ago
Launch ID: a6489b52-40b8-49cb-8fdb-9fd7ca6ae2cd
●Open-Meteo Weather1 week ago
Pad weather at 28.45, -80.57
Mission Profile
Relay 2 was a Thor Delta B mission operated by United States Air Force that lifted off from Space Launch Complex 17B, Cape Canaveral SFS, FL, USA on January 21, 1964. The flight carried its payload on a communications mission to Elliptical Orbit. The launch was a success.