Blastoff! Vulcan Centaur Rocket Launches Space Force 'Neighborhood Watch' Satellites

Why It Matters

The mission proves Vulcan Centaur’s readiness for critical national‑security payloads, bolstering U.S. space‑force capabilities and advancing greener, high‑performance launch technology.

Key Takeaways

• ULA launched Vulcan Centaur on mission SF87 for Space Force
• Four solid rocket boosters provided extra thrust at liftoff
• Core BE4 engines use methane, producing distinctive blue plume
• Centaur upper stage will ignite RL10 engines to reach GEO
• All ascent milestones reported nominal, confirming Vulcan’s reliability

Summary

United Launch Alliance’s Vulcan Centaur lifted off at 02:00 UTC on a United States Space Force mission designated SF87, deploying a trio of “neighborhood watch” satellites into geostationary orbit. The launch employed a two‑stage configuration: four GEM‑63XL solid rocket boosters supplied an initial thrust surge, after which they were jettisoned and the methane‑fuelled BE‑4 core engines took over, creating a characteristic blue exhaust.

During ascent, telemetry showed healthy body rates, successful booster burnout, and clean stage separation. The vehicle reached roughly 270 mi down‑range at 10,000 mph before the Centaur upper stage began its chill‑down sequence and ignited the twin RL10 hydrogen engines, positioning the payload for its final GEO insertion. Throughout, mission control reported nominal performance across all key parameters.

Commentators highlighted the “very clean liftoff” and the smooth progression through early milestones, underscoring the reliability of ULA’s fourth Vulcan flight. The use of liquid natural gas in the BE‑4 marks a shift toward greener propellants, while the combined thrust of about three million pounds demonstrates the vehicle’s capability to handle heavy national‑security payloads.

The successful launch reinforces ULA’s role as the primary launch provider for U.S. defense satellites, validates the Vulcan Centaur’s design for future high‑value missions, and signals continued investment in methane‑based propulsion for next‑generation launch systems.

Original Description

A Vulcan Centaur rocket launched a pair of USSF-87 surveillance satellites for the for the U.S. Space Force from Cape Canaveral Space Force Station in Florida at 4:22 a.m. EST (0922 GMT), Full Story: https://www.space.com/space-exploration/launches-spacecraft/ula-vulcan-centaur-ussf-87-launch-space-surveillance-satellites

Credit: ULA