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SpaceX/Falcon 9 Block 5·Space Launch Complex 4E

Falcon 9 Block 5 | USSF-259

Orbit: PO·Type: Government/Top Secret·Agencies: United States Space Force

Mission Elapsed Time (MET)

GMT Time
Spaceport
Launch Successful
Falcon 9 Block 5 | USSF-259 mission image
Vehicle: Falcon 9 Block 5Credit: SpaceX · Launch Library 2

USSF-259 is a classified mission for the United States Space Force. It is possibly a batch of classified LEO satellites based on SpaceX’s Starshield satellite bus, based on locations of ascent rocket stage drop zones being fits with previous SDA Transport Layer launches.

Target orbit
PO · Polar Orbit
Mission type
Government/Top Secret
Payload
USSF-259
Agencies
United States Space Force

Target liftoff time (UTC)

01:07:56 UTC

Thursday, 17 September 2026

Planned T-0 liftoff

01:00:00 UTCWindow open
01:07:56 UTCPlanned ignition
05:00:00 UTCWindow close
Rocket family
Falcon
Height
70m
Diameter
3.7m
Payload to LEO
22,800kg
Liftoff thrust
7,607kN
Stages
2