B1103

At a Glance

Booster B1103 is a Falcon 9 Block 5 first stage built by SpaceX, and it entered service in April 2026 with a single Vandenberg flight under its belt. The booster is flight-proven, meaning it has successfully launched and landed at least once, and remains active in SpaceX's rotation for future missions. With one flight and one successful recovery, B1103 represents the ongoing cadence of reusable rocket operations that have become routine along the Central Coast.

As part of the Block 5 variant, B1103 benefits from the final major design iteration of the Falcon 9, a configuration optimized for rapid turnaround and high reusability. The Block 5 series has demonstrated the ability to fly ten or more times with minimal refurbishment, and SpaceX has pushed individual boosters past a dozen flights. B1103 is just beginning that cycle, joining a fleet of dozens of active first stages that rotate between Florida, Vandenberg, and occasional customer-specific missions.

The Career of B1103

B1103 lifted off for the first time on April 7, 2026, carrying the Starlink Group 17-35 mission from Space Launch Complex 4E at Vandenberg Space Force Base. The launch marked the booster's debut and added another node to SpaceX's growing Starlink constellation, which provides broadband internet coverage globally. For Vandenberg, which has become a high-tempo Starlink launch site in recent years, the mission was one of many that rise from the coastal pads and arc south over the Pacific.

After stage separation roughly two and a half minutes into flight, B1103 executed a powered descent and touched down on the autonomous droneship Of Course I Still Love You, stationed several hundred miles downrange in the Pacific Ocean. The landing was clean, marking a perfect one-for-one record on the booster's first outing. SpaceX transported the recovered stage back to port, likely to begin inspections and prepare it for its next assignment.

With only one flight so far, B1103 has yet to establish a clear reuse pattern, but the booster's active status suggests it will return to a launch pad soon. SpaceX typically rotates boosters based on mission requirements, available inventory, and turnaround logistics, so B1103 could fly again from Vandenberg or migrate to Florida for an East Coast mission. The booster's youth and clean record make it a prime candidate for continued use.

Vandenberg Missions

On April 7, 2026, B1103 launched Starlink Group 17-35 from SLC-4E, its first and only Vandenberg mission to date. The flight succeeded in delivering its satellite payload to low Earth orbit and returned the booster intact to the Pacific droneship.

Landings and Recovery

B1103 has attempted one landing and succeeded, giving it a perfect recovery record so far. That single recovery took place on the droneship Of Course I Still Love You, which SpaceX positions in the Pacific for most Vandenberg launches. Droneship landings are the norm for missions that carry heavy payloads or target certain orbits, since the booster lacks the fuel reserves to reverse course and fly back to the coast. The autonomous barges, equipped with grid fins for precise positioning and a crew that arrives after the landing, have become a reliable recovery platform for SpaceX's West Coast operations.

Occasionally, lighter missions allow a booster to perform a return-to-launch-site landing at Landing Zone 4, the concrete pad adjacent to SLC-4E. Those flights produce a distinctive double sonic boom as the booster descends through the atmosphere over land, a sound that echoes across Lompoc and can reach as far north as Santa Maria. Residents have grown accustomed to the rumble, which announces a successful return. B1103 has not yet performed an LZ-4 landing, but if it draws a lighter Starlink or rideshare mission in the future, it could execute that maneuver and give the 805 another audible reminder of the rocket age unfolding overhead.

Still in the Game

B1103 is active and waiting for its next assignment, a young booster with plenty of flights ahead. In an era when SpaceX routinely flies individual first stages a dozen times or more, a single-flight booster represents untapped potential. Whether it returns to Vandenberg for another Starlink run or ships to Florida for a customer mission, B1103 has proven it can deliver payloads to orbit and return intact, and that reliability is what keeps the Central Coast launch tempo high and the reusable rocket fleet growing.