United Launch Alliance successfully launched Atlas V 551 rocket on July 2, 2026, at 4:30 AM UTC from Cape Canaveral Space Force Station in Florida, carrying 29 Amazon Leo satellites. Amazon Leo, the commercial name for Project Kuiper, represents Amazon's ambitious effort to establish a global broadband internet constellation in low Earth orbit. The complete constellation will ultimately comprise 3,276 satellites distributed across 98 orbital planes at three distinct altitudes: 590 km, 610 km, and 630 km, delivering internet connectivity to underserved regions worldwide.

The Atlas V 551 configuration utilized five solid rocket boosters strapped to its first stage, generating 12,141 kilonewtons of liftoff thrust. The vehicle's 5.4-meter diameter payload fairing provided adequate protection for the satellite stack during ascent. Cape Canaveral SFS has proven instrumental for Amazon's constellation deployment, demonstrating rapid launch cadence capabilities for this phase of the project.

The mission successfully deployed its payload to the target orbital altitude. This launch marked the eighth dedicated Amazon Leo mission and represented ULA's fourth orbital launch of 2026, underscoring the increasing operational tempo required to establish the mega constellation. The successful deployment advances Amazon's timeline toward completing its satellite internet network for global coverage.