MISSION OVERVIEW
Satellite designed to test an infrared celestial mapping sensor system.
LAUNCH DETAILS
VEHICLE
Thor Burner 2AGENCY
United States Air ForceMISSION
SESP 1
MISSION TYPE
Test Flight
TARGET ORBIT
Polar Orbit
LAUNCH PAD
Space Launch Complex 10WLAUNCH SITE
Vandenberg SFB, CA, USACOUNTRY
USA
LAUNCH TIME VERIFICATION
CONFIRMEDPrecision: Minute
LAUNCH LIBRARY 2 PRIMARY
API ID: 7994f102-6214-4ed0-80af-f305588ca107
Reported date: Jun 8, 1971 at 14:00 UTC
Last synced: 2 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 Burner 2 →
MANUFACTURER
McDonnell Douglas
VARIANT
Burner 2
FLIGHTS
12
SUCCESSES
12
SUCCESS RATE
100%
The Thor-Burner was an American expendable launch system, a member of the Thor rocket family. It consisted of a Thor missile, with one or two Burner upper stages.
FREQUENTLY ASKED QUESTIONS
When is the Thor Burner 2 | SESP 1 launch?
The Thor Burner 2 | SESP 1 is scheduled for Tuesday, June 8, 1971 at 2:00 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 SESP 1?
The Thor Burner 2 | SESP 1 mission uses the Thor Burner 2 rocket, manufactured by McDonnell Douglas. The Thor Burner 2 has flown 12 times with a 100% success rate.
Where is the Thor Burner 2 | SESP 1 launching from?
The launch takes place from Space Launch Complex 10W at Vandenberg SFB, CA, USA.
What orbit is SESP 1 going to?
The SESP 1 mission is targeting Polar Orbit.
Who is launching SESP 1?
The Thor Burner 2 | SESP 1 is operated by United States Air Force.
Can I watch the Thor Burner 2 | SESP 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.
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: Jun 8, 1971 at 14:00 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: 2 minutes ago
●Launch Library 24 minutes ago
Launch ID: 7994f102-6214-4ed0-80af-f305588ca107
●Open-Meteo Weather1 day ago
Pad weather at 34.77, -120.62
Mission Profile
SESP 1 was a Thor Burner 2 mission operated by United States Air Force that lifted off from Space Launch Complex 10W, Vandenberg SFB, CA, USA on June 8, 1971. The flight carried its payload on a test flight mission to Polar Orbit. The launch was a success.