SPACEX
Falcon 9 Block 5 | USSF-366
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Aug 16, 2026 at 01:50 UTC
▸ Flight profile›
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4 streams
PADSpace Launch Complex 4E
SITEVandenberg SFB, CA, USA →ORBITLow Earth Orbit
TYPEGovernment/Top Secret
MISSION OVERVIEW
USSF-366 is a classified mission for the United States Space Force. It is possibly a batch of classified LEO satellites for a US government entity based on SpaceX’s Starshield satellite bus, based on locations of rocket stage drop zones being exact fits with previous Starlink Group 15 launches.
LAUNCH DETAILS
VEHICLE
Falcon 9AGENCY
SpaceXMISSION
USSF-366
MISSION TYPE
Government/Top Secret
TARGET ORBIT
Low Earth Orbit
LAUNCH PAD
Space Launch Complex 4ELAUNCH SITE
Vandenberg SFB, CA, USACOUNTRY
USA
LAUNCH TIME VERIFICATION
CONFIRMEDPrecision: Half-year
LAUNCH LIBRARY 2 PRIMARY
API ID: 55b79515-ddbf-4198-8a59-29a12ed21330
Reported date: Aug 16, 2026 at 01:50 UTC
Last synced: 2 minutes ago
SPACEX API
Cross-referenced with community SpaceX data
This launch date and time are confirmed by the launch provider. Countdown is active.
SCHEDULE & STATUS HISTORY
STATUS CHANGEAug 16, 2026 at 04:58 UTC
IN FLIGHT → SUCCESS
Source: Launch Library 2
STATUS CHANGEAug 16, 2026 at 01:53 UTC
GO → IN FLIGHT
Source: Launch Library 2
DELAYED(2.1 hrs)
Aug 15, 2026 at 19:07 UTCAug 15, 2026 23:47 → Aug 16, 2026 01:50 UTC
Source: Launch Library 2
DELAYED(1.9 hrs)
Aug 15, 2026 at 16:36 UTCAug 15, 2026 21:54 → Aug 15, 2026 23:47 UTC
Source: Launch Library 2
DELAYED(0 hrs)
Aug 15, 2026 at 05:18 UTCAug 15, 2026 21:52 → Aug 15, 2026 21:54 UTC
Source: Launch Library 2
STATUS CHANGEAug 10, 2026 at 20:53 UTC
TBC → GO
Source: Launch Library 2
LAUNCH MAP
PAD WEATHER
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BOOSTER — B1088 →
#18THIS FLIGHT
17TOTAL FLIGHTS
18/18LANDINGS
48dTURNAROUND
FLIGHT-PROVEN BOOSTER
ASDS — Of Course I Still Love You SUCCESS
First flight: Nov 30, 2024Previous flight: Jun 28, 2026
VEHICLE — Falcon 9 →
MANUFACTURER
SpaceX
VARIANT
Block 5
FLIGHTS
622
SUCCESSES
620
SUCCESS RATE
99.7%
Falcon 9 is a two-stage rocket designed and manufactured by SpaceX for the reliable and safe transport of satellites and the Dragon spacecraft into orbit. The Block 5 variant is the fifth major interval aimed at improving upon the ability for rapid reusability.
LAUNCH VIDEOS
ARTICLES & COVERAGE
MORE INFO
FREQUENTLY ASKED QUESTIONS
When is the Falcon 9 Block 5 | USSF-366 launch?
The Falcon 9 Block 5 | USSF-366 is scheduled for Sunday, August 16, 2026 at 1:50 AM UTC. This is the NET (No Earlier Than) time and may be subject to change. Current status: SUCCESS.
What rocket is being used for USSF-366?
The Falcon 9 Block 5 | USSF-366 mission uses the Falcon 9 rocket, manufactured by SpaceX. The Falcon 9 has flown 622 times with a 99.7% success rate.
Where is the Falcon 9 Block 5 | USSF-366 launching from?
The launch takes place from Space Launch Complex 4E at Vandenberg SFB, CA, USA.
What orbit is USSF-366 going to?
The USSF-366 mission is targeting Low Earth Orbit.
Who is launching USSF-366?
The Falcon 9 Block 5 | USSF-366 is operated by SpaceX.
Can I watch the Falcon 9 Block 5 | USSF-366 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
Aug 16, 2026 04:58 UTC
Launch completed successfully
Updated via Launch Library 2
Aug 16, 2026 04:58 UTC
Status changed: IN FLIGHT u2192 SUCCESS
Launch completed successfully (via Launch Library 2)
Aug 16, 2026 01:53 UTC
Status changed: GO u2192 IN FLIGHT
Launch IN FLIGHT (via Launch Library 2)
Aug 15, 2026 19:07 UTC
Launch delayed by 2.1 hours
Aug 15, 2026 23:47 UTC u2192 Aug 16, 2026 01:50 UTC (via Launch Library 2)
Aug 15, 2026 16:36 UTC
Launch delayed by 1.9 hours
Aug 15, 2026 21:54 UTC u2192 Aug 15, 2026 23:47 UTC (via Launch Library 2)
Aug 15, 2026 05:18 UTC
Launch delayed by 0 hours
Aug 15, 2026 21:52 UTC u2192 Aug 15, 2026 21:54 UTC (via Launch Library 2)
Aug 10, 2026 20:53 UTC
Status changed: TBC u2192 GO
Launch GO for launch (via Launch Library 2)
Aug 6, 2026 19:44 UTC
Launch added to tracker
Imported from Launch Library 2 API
Aug 6, 2026 19:44 UTC
Launch date set: Aug 16, 2026 at 01:50 UTC
NET (No Earlier Than) confirmed by SpaceX
LIVE DATA SOURCES
Last data sync: 2 minutes ago
●Launch Library 22 minutes ago
Launch ID: 55b79515-ddbf-4198-8a59-29a12ed21330
●Open-Meteo Weather1 week ago
Pad weather at 34.63, -120.61
Mission Profile
USSF-366 was a Falcon 9 Block 5 mission operated by SpaceX that lifted off from Space Launch Complex 4E, Vandenberg SFB, CA, USA on August 16, 2026. The flight carried its payload on a government/top secret mission to Low Earth Orbit. The first stage, booster B1088, made its 18th flight, returning to service just 48 days after its previous mission. The launch was a success.