Atlas 5 – 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 begins de-stacking Vulcan rocket, pivots to Atlas 5 launch of Amazon’s Kuiper satellites for first 2025 mission

February 7, 2025 Will Robinson-Smith

The change in manifest comes as the U.S. Space Force’s Assured Access to Space continues the certification process for the Vulcan rocket. United Launch Alliance will begin stacking an Atlas rocket in the coming weeks.

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).

Third time’s the charm for the Boeing Starliner Crew Flight Test

June 5, 2024 Will Robinson-Smith

The launch of two NASA astronauts dealt with two previous scrubs due to a valve issue on the Atlas 5 rocket and then a ground system issue at the launchpad. Liftoff happened at 10:52 a.m. EDT (1452 UTC) on Wednesday, June 5.

NASA astronauts arrive at Kennedy Space Center ahead of Boeing Starliner Crew Flight Test

April 25, 2024 Will Robinson-Smith

Astronauts Butch Wilmore and Suni Williams arrived at the Cape in T-38 jets, the first such arrival since the space shuttle era. The mission is aiming to launch on Monday, May 6, at 10:34 p.m. EDT (0234 UTC).

Aerojet Rocketdyne, ULA mark 60th anniversary of RL10 rocket engine

November 28, 2023 Will Robinson-Smith

A rocket engine with a long pedigree marked a big milestone on Monday. It’s 60 years since the hydrogen-fueled RL10 engine debuted onboard a Centaur upper stage launched from Cape Canaveral on Nov. 27, 1963.

Atlas 5 rocket launches Amazon’s first Kuiper satellites from Cape Canaveral

October 6, 2023 Spaceflight Now

A ULA Atlas 5 rocket is set to launch no earlier than 2 p.m. EDT (1800 UTC) on Friday, Oct. 6. It will sent up two prototype satellites for Amazon’s Project Kuiper satellite internet constellation.

Atlas 5 delivers first Amazon internet satellites to orbit on Friday

October 5, 2023 Will Robinson-Smith

Amazon is getting its own delivery fulfilled this Friday, adding to an extensive portfolio that includes its online marketplace, streaming video, grocery and cloud services, with the launch of two prototype relay stations for a space-based internet service it calls Project Kuiper.

Atlas 5 rocket returns to pad for spy satellite agency launch from Cape Canaveral

September 8, 2023 Will Robinson-Smith

United Launch Alliance’s Atlas 5 rocket made its way back to the pad at Space Launch Complex 41 at Cape Canaveral Space Force Station on Thursday morning for a mission carrying national security mission payloads, collectively codenamed Silentbarker. Liftoff has been rescheduled for at 8:47 a.m. EDT (1247 UTC).