SpaceX is targeting Thursday for the twelfth flight test of its Starship launch system. The upcoming mission shifts the testing focus from incremental stage recovery to validating heavily redesigned hardware, stressing structural endurance, and executing the platform’s first in-space payload deployment. The launch window opens at 5:30 p.m. CT.
Flight 12 represents an operational leap, serving as the debut for the next-generation V3 iterations of both the Starship upper stage and the Super Heavy booster, powered by newly evolved Raptor 3 engines.
To support the upgraded vehicle, the mission will be the first to launch from Starbase’s newly constructed Pad 2 (Orbital Launch Pad B). The updated pad features a dedicated, water-cooled flame trench beneath the launch mount, a significant infrastructure upgrade designed to better dissipate exhaust energy and minimize pad damage during liftoff.
With the introduction of new vehicle architecture, SpaceX will not attempt a tower catch of the Super Heavy booster on this flight. The booster will instead execute a controlled return and splashdown in the Gulf of Mexico. This profile allows the company to gather ascent and return data on the redesigned stage without risking the launch pad infrastructure.
Building on previous payload deployment demonstrations, Flight 12 will execute a significantly more complex deployment sequence. The upper stage is carrying 20 Starlink simulators sized to match next-generation Starlink V3 satellites, alongside two active, modified Starlink units. Once deployed on a suborbital trajectory, the active satellites will scan Starship’s heat shield and transmit diagnostic imagery back to ground controllers to assess thermal protection readiness.
During the reentry phase, testing will focus on thermal limits and structural integrity. Engineers intentionally removed a single heat shield tile to measure aerodynamic load shifts on adjacent tiles during plasma heating. Additional tiles were painted white to serve as visual targets for the deployed diagnostic satellites.
The descent profile includes intentional aerodynamic maneuvers to stress the vehicle’s rear flaps, followed by a dynamic banking sequence that simulates the trajectory required for future returns to the launch site.
Prior to reentry, the mission plan includes an in-space relight of a single Raptor engine—a necessary capability for future orbital maneuvering and deorbit burns. SpaceX noted the primary goal of Flight 12 is to demonstrate these new architectural elements in a flight environment for the first time to support the development of full and rapid reusability.