SpaceX launched the final three satellites for SES’s O3b mPower constellation on Sunday, completing a medium Earth orbit network that has been in development for over a decade. The Falcon 9 mission, which took place during an 87-minute window opening at 2:49 p.m. Eastern from Cape Canaveral, delivered satellites F11, F12, and F13 to their target orbit, marking the culmination of a partnership signed between Boeing and SES more than ten years ago.

What Happened

The three new satellites joined the existing O3b mPower fleet in medium Earth orbit at approximately 5,000 miles above Earth. This altitude is more than ten times higher than Starlink’s low Earth orbit shell at roughly 340 miles, but significantly lower than the 22,000-mile geostationary orbit. The medium Earth orbit placement allows SES to blanket the globe with just 13 satellites, a fraction of the number required for low-orbit constellations to achieve similar coverage. The mission also represented the 29th flight for this specific Falcon 9 booster, which had previously supported two crewed Axiom missions, the European Space Agency’s Euclid telescope, and 22 Starlink batches. The booster successfully landed on the droneship A Shortfall of Gravitas, contributing to what the source describes as the 661st successful Falcon booster landing to date.

Why It Matters

The completion of the O3b mPower constellation highlights a strategic divergence in SpaceX’s role within the satellite broadband market. While Starlink is designed for volume, targeting consumers, RVs, homes, and small businesses, O3b mPower focuses exclusively on enterprise-grade connectivity for airlines, cruise lines, offshore energy operators, telecom backhaul, and government entities. The networks are priced and provisioned differently, with O3b mPower offering service more akin to a dedicated circuit. This distinction allows for complementary use cases; a 2023 partnership enables cruise ships to combine Starlink’s speed with O3b mPower’s steady capacity depending on real-time needs. By finishing this 13-satellite network, SES secures a finished medium-orbit half of this pairing, offering a reliable alternative to the thousands of satellites typically required for global coverage in lower orbits.

The Bottom Line

SpaceX’s launch of the final O3b mPower satellites underscores that its launch schedule continues to accommodate third-party constellations alongside its own Starlink expansion. With Starlink having surpassed 11,000 satellites in August, this mission serves as a reminder that Falcon 9 remains a viable platform for specialized, high-altitude networks like SES’s, which target distinct enterprise markets rather than the mass consumer base served by Starlink.