PADSpace Launch Complex 3W
SITEVandenberg SFB, CA, USA →ORBITLow Earth Orbit
TYPEGovernment/Top Secret
MISSION OVERVIEW
The KH-4B (Keyhole-4B) was sixth optical reconnaissance satellite version in the Corona-program.
LAUNCH DETAILS
VEHICLE
Thorad SLV-2H Agena DAGENCY
United States Air ForceMISSION
KH-4B 15
MISSION TYPE
Government/Top Secret
TARGET ORBIT
Low Earth Orbit
LAUNCH PAD
Space Launch Complex 3WLAUNCH SITE
Vandenberg SFB, CA, USACOUNTRY
USA
LAUNCH TIME VERIFICATION
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: ed26b6b6-5dfd-4ad7-821e-69e8c68f68ab
Reported date: Sep 10, 1971 at 21:32 UTC
Last synced: 1 hour ago
This launch date and time are confirmed by the launch provider. Countdown is active.
LAUNCH MAP
PAD WEATHER
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VEHICLE — Thorad SLV-2H Agena D →
MANUFACTURER
McDonnell Douglas
VARIANT
SLV-2H Agena D
FLIGHTS
13
SUCCESSES
12
SUCCESS RATE
92.3%
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 Thorad SLV-2H Agena D | KH-4B 15 launch?
The Thorad SLV-2H Agena D | KH-4B 15 is scheduled for Friday, September 10, 1971 at 9:32 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 KH-4B 15?
The Thorad SLV-2H Agena D | KH-4B 15 mission uses the Thorad SLV-2H Agena D rocket, manufactured by McDonnell Douglas. The Thorad SLV-2H Agena D has flown 13 times with a 92.3% success rate.
Where is the Thorad SLV-2H Agena D | KH-4B 15 launching from?
The launch takes place from Space Launch Complex 3W at Vandenberg SFB, CA, USA.
What orbit is KH-4B 15 going to?
The KH-4B 15 mission is targeting Low Earth Orbit.
Who is launching KH-4B 15?
The Thorad SLV-2H Agena D | KH-4B 15 is operated by United States Air Force.
Can I watch the Thorad SLV-2H Agena D | KH-4B 15 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 21:44 UTC
Launch added to tracker
Imported from Launch Library 2 API
Mar 28, 2026 21:44 UTC
Launch date set: Sep 10, 1971 at 21:32 UTC
NET (No Earlier Than) confirmed by United States Air Force
Mar 28, 2026 21:44 UTC
Launch completed successfully
Updated via Launch Library 2
LIVE DATA SOURCES
Last data sync: 1 hour ago
●Launch Library 21 hour ago
Launch ID: ed26b6b6-5dfd-4ad7-821e-69e8c68f68ab
●Open-Meteo Weather1 hour ago
Pad weather at 34.64, -120.59
