Atlas 5-551 – Spaceflight Now

ULA launches Kuiper 2 mission on Atlas 5 rocket from Cape Canaveral

June 22, 2025 Will Robinson-Smith

The 27 Kuiper satellites will head to low Earth orbit on an Atlas 5 rocket flying in a 551 configuration, using five solid rocket boosters. ULA launched its rocket at 6:54 a.m. EDT (1054 UTC) on Monday, June 23.

Atlas 5 booster engine issue causes scrub of Monday’s Kuiper 2 launch

June 15, 2025 Will Robinson-Smith

The 27 Kuiper satellites will head to low Earth orbit on an Atlas 5 rocket flying in a 551 configuration, using five solid rocket boosters. ULA has not announced a new launch date following the scrub.

ULA launches first production Amazon Kuiper satellites on Atlas 5 rocket from Cape Canaveral

April 28, 2025 Will Robinson-Smith

The rescheduled mission comes following the April 9 scrub due to poor weather and a period on the Eastern Range marked by a noted lack of orbital launches. Liftoff from pad 41 at Cape Canaveral Space Force Station is targeting Monday, April 28, at 7 p.m. EDT (2300 UTC).

Poor weather forces a scrub of the Kuiper 1 launch on a ULA Atlas 5

April 9, 2025 Will Robinson-Smith

The mission will be the first deployment of full production Kuiper satellites into low Earth orbit. ULA is determining their next launch opportunity following the scrub Wednesday evening.

Amazon targets April 9 for launch of 1st production satellites for its Project Kuiper internet mega-constellation

April 3, 2025 Will Robinson-Smith

The mission will send the first full batch of 27 operational satellites into low Earth orbit. United Launch Alliance will launch its Atlas 5 551 rocket from pad 41 at Cape Canaveral Space Force Station on April 9 during a three-hour window that opens at 12 p.m. EDT (1600 UTC).

ULA launches Atlas 5 rocket on the company’s 100th national security mission

July 29, 2024 Will Robinson-Smith

The United States Space Force 51 (USSF-51) mission was the 58th and final time an Atlas 5 rocket launches a national security payload. Liftoff happened at Tuesday, July 30, during a three-hour window that opens at 6:45 a.m. EDT (1045 UTC).

Preview: Navy craft to ride milestone Atlas-Centaur launching

January 17, 2015 Justin Ray

The 200th Atlas-Centaur rocket, history some 52 years in the making, will blast off Tuesday from Cape Canaveral to deliver a U.S. Navy mobile communications satellite into orbit.