Overview
- SpaceX is set to launch the USSF-153 mission from Vandenberg Space Force Base in a three-hour window opening at 8:37 a.m. PDT on Thursday, Sept. 10, 2026, with a backup window on Sept. 11.
- The payload is reported as classified and will place an undisclosed number of satellites into low Earth orbit, with post-launch details intentionally limited by the customer.
- The assigned Falcon 9 first stage is booster B1081 on its 27th flight and is planned to attempt a landing on the droneship Of Course I Still Love You in the Pacific Ocean.
- Media and public viewing options include live coverage from Spaceflight Now beginning about 30 minutes before liftoff and a KEYT webcast starting roughly 10 minutes ahead of launch alongside SpaceX’s X posts.
- USSF-153 continues a 2026 run of SpaceX national-security launches and highlights the company’s operational emphasis on highly reused boosters, while local authorities warned residents to expect possible sonic booms during the mission.