ULA

ICYMI: The Atlas V lit up the sky last night powered by the main engine and five solid rocket boosters generating 2.7 million pounds (12 megaNewtons) of thrust to lift the next 29 satellites into space for @Amazonleo

@NASAAdmin @Amazonleo Thank you! The workhorse Atlas V does it again! 🚀

@ulalaunch @Amazonleo Congrats

LIFTOFF of the United Launch Alliance Atlas V rocket and the next satellites for @AmazonLeo to enhance broadband access and connect the world! bit.ly/av_leo6

📸 Atlas V Amazon Leo 6 official launch photo album has arrived! flic.kr/s/aHBqjCPWNq

This never gets old. Congrats @Amazonleo and @ulalaunch!

United Launch Alliance Expands Global Connectivity with Successful @AmazonLeo Launch newsroom.ulalaunch.com/releases/unite…

United Launch Alliance has successfully completed today's launch of the Amazon Leo 6 mission by the Atlas V rocket! All 29 advanced broadband satellites have been released into low Earth orbit, matching the venerable rocket family's record for the largest and heaviest payload ever launched. Atlas V has delivered a total of 168 Amazon spacecraft into orbit through a total of seven successful flights -- Protoflight and six launches for the Leo constellation. Next up, Leo 7 with another 29 satellites, is planned for May 22. bit.ly/av_leo6 //@AmazonLeo

LIFTOFF of United Launch Alliance's sixth mission for Amazon Leo as the Atlas V rocket clears the tower! bit.ly/av_leo6

GO for launch! The final readiness poll by Launch Conductor Scott Barney is complete and Launch Director Eric Richards has given final permission to launch our fourth Amazon Leo mission! GO ATLAS! GO CENTAUR! GO AMAZON LEO! Watch the live launch webcast here: bit.ly/av_leo6

We have a new target launch time of 8:53:30 p.m. EDT (0053:30 UTC) for Atlas V. The launch weather officer confirms that all conditions remain observed and forecast GO for liftoff. Live launch webcast is about to begin. Tune in! bit.ly/av_leo6

Atlas V is fully fueled and configured for today's Amazon Leo 6 mission that will advance our customer's mission to provide fast, reliable internet to communities around the world. Clocks are holding at T-minus 4 minutes for a 30-minute planned built-in hold before final readiness polls and we enter terminal count. bit.ly/av_leo5

Just 45 minutes remain until liftoff of the next satellites for Amazon Leo. This Atlas V, designated AV-112, is a two-stage rocket that incorporates five GEM 63 solid rocket boosters, features a single RL10C-1-1 engine on the Centaur upper stage and encapsulates the spacecraft in a 5.4-meter-diameter (17.7-foot) payload fairing.

Cryo tanking operations are progressing smoothly to fill the Atlas V with the liquid rocket fuel needed to accomplish today's launch of 29 satellites for @AmazonLeo. We have a green board with no issues being addressed today by the ULA launch team and continue to target 8:52 p.m. EDT (0052 UTC) for liftoff. bit.ly/av_leo6

Atlas V fueling is underway with cryogenic propellants for today's Amazon Leo 6 launch. Atlas and Centaur propulsion console operators here at ULA's Launch Control Center are performing the steps to command the pad systems to begin flowing 66,000 gallons of liquid oxygen and liquid hydrogen in the rocket over the next 90 minutes. Weather forecast is 80% favorable to launch at 8:52 p.m. EDT (0052 UTC). bit.ly/av_leo6 // @AmazonLeo

Good evening from Atlas V launch control at Cape Canaveral where our live blog has started for today's Amazon Leo 6 mission. This is your official source for updates throughout the countdown to the 8:52 p.m. EDT (0052 UTC) launch. We are on schedule to launch an Atlas V 551 rocket carrying the Amazon Leo 6 broadband satellite mission to low Earth orbit tonight. The payload consists of 29 spacecraft, the largest configuration for Atlas Leo. And a head's up for spectators along the U.S. East Coast, this is your chance to witness a rocket heading into space this evening! bit.ly/av_leo6 // @AmazonLeo

Atlas V rolled from the VIF to the pad at SLC-41 with another 29-satellite Leo payload, exactly 23 days after our last mission with @ULAlaunch. Leo Atlas 6 (LA-06) is scheduled to liftoff tonight, Apr 27, at 8:52 p.m. ET. ULA is using a streamlined roll-to-launch flow for this mission, with rollout, testing, fueling, and liftoff all within a single countdown. The process helps enable a faster turnaround between missions, allowing for a higher launch cadence as we prepare to transition from Atlas V to Vulcan. We’re now on the second of four back-to-back Leo launches on Atlas V, building steady momentum as we expand our constellation.

📷 Atlas V and @AmazonLeo travel to the launch pad at sunrise this morning. Photo album: flic.kr/s/aHBqjCPWNq

ULA's Roll & Preps Crew moved the Atlas V 551 rocket to Space Launch Complex-41 this morning to deliver Amazon's next 29 broadband satellites into space later tonight. Liftoff time is 8:52 p.m. EDT (0052 UTC). ULA is proceeding with a continuous roll-and-launch in a single-day countdown, part of our efforts to increase launch cadence for our @AmazonLeo customer. This effort reduces the amount of time the rocket spends at the pad, enabling launch to occur sooner. bit.ly/av_leo6

United Launch Alliance has initiated the countdown for launch of our sixth Atlas V 551 rocket to advance the Amazon Leo broadband constellation. But this countdown is unlike Atlas V launches you are accustomed to. Over the next 18 hours, we will move the 20-story rocket from the Vertical Integration Facility (VIF) to the pad, perform all of the necessary testing, load propellant and launch the mission. This is part of ULA's efforts to increase launch day efficiency and maximize launch opportunities while continuing our commitment to Amazon Leo. It increases launch cadence by reducing the amount of time that the rocket spends at the pad. Tonight's launch time is 8:52 p.m. EDT (0052 UTC) from Cape Canaveral. The weather forecast has improved to 85% GO. bit.ly/av_leo6 // @AmazonLeo

Want to know how you can stay up-to-date with the countdown and watch our livestream of the Atlas V launch for Amazon Leo Monday? Here's how! Visit: bit.ly/av_leo6 // @AmazonLeo