Watch the Launch

Watch the Launch

Additional Media

Watch live: ULA Atlas 5 rocket launches from Cape Canaveral with 29 Amazon Leo satellites

Watch live coverage of the launch of a United Launch Alliance Atlas 5 rocket with a batch of 29 satellites for Amazon's Leo internet service on Monday, April 27, 2026. Liftoff is scheduled during a 29-minute launch window that opens at 8:52 p.m. EDT (0052 UTC). The rocket will take …

ULA Atlas V 551 launches Amazon Leo Atlas 6 (LA-06)

ULA Atlas V launch of the Amazon Leo Atlas 6 (LA-06) mission from SLC-41. Launch Window: April 27th from 8:52PM to 9:21PM EDT (00:52-01:21 UTC on the 28th) Current T0: April 27th at 8:52PM EDT (00:52 UTC on the 28th) Mission: Atlas V 551 launch of a batch of 29 …

Atlas V Amazon Leo 6

ULA's Atlas V rocket will deliver another batch of satellites into low Earth orbit for Amazon Leo, the broadband constellation. Its mission is to provide fast, reliable internet to customers around the world, including those in unserved and underserved communities, using a network of more than 3,000...

Amazon Leo (LA-06)

Overview

Destination: Low Earth Orbit
Mission: Communications

Low Earth Orbit Space Launch Complex 41 Cape Canaveral SFS, FL, USA Probability: 80%

Amazon Leo, formerly known as Project Kuiper, is a mega constellation of satellites in Low Earth Orbit that will offer broadband internet access, this constellation will be managed by Kuiper Systems LLC, a subsidiary of Amazon. This constellation is planned to be composed of 3,276 satellites. The satellites are projected to be placed in 98 orbital planes in three orbital layers, one at 590 km, 610 km and 630 km altitude. 29 satellites are carried on this launch.

Telemetry

Launch trajectory and telemetry simulations provided by Flight Club - a rocket launch simulator and orbital trajectory visualiser for all things space!

Updates

Cosmic_Penguin • April 28, 2026, 1:31 a.m.

Launch success, all satellites deployed.


Cosmic_Penguin • April 28, 2026, 12:53 a.m.

Liftoff.


LL2 • April 28, 2026, 12:33 a.m.

Official Webcast by United Launch Alliance has started


Cosmic_Penguin • April 28, 2026, 12:26 a.m.

New T-0.



Atlas V 551

Family:
Configuration: 551

Atlas V is an expendable launch system in the Atlas rocket family. It was formerly operated by Lockheed Martin and is now operated by United Launch Alliance (ULA), a joint venture with Boeing. Each Atlas V rocket uses a Russian-built RD-180 engine burning kerosene and liquid oxygen to power its first stage and an American-built RL10 engine burning liquid hydrogen and liquid oxygen to power its Centaur upper stage. The RD-180 engines are provided by RD Amross, while Aerojet Rocketdyne provides both the RL10 engines and the strap-on boosters used in some configurations. The standard payload fairing sizes are 4 or 5 meters in diameter and of various lengths. Fairings sizes as large as 7.2 m in diameter and up to 32.3 m in length have been considered. The rocket is assembled in Decatur, Alabama and Harlingen, Texas.

Specifications
  • Minimum Stage
    1
  • Max Stage
    2
  • Length
    59.7 m
  • Diameter
    3.8 m
  • Fairing Diameter
    5.4 m
  • Launch Mass
    573.0 T
  • Thrust
    12269.0 kN
Family
  • Name
    Atlas V 551
  • Family
  • Variant
    551
  • Alias
  • Full Name
    Atlas V 551
Payload Capacity
  • Launch Cost
    $153000000
  • Low Earth Orbit
    18850.0 kg
  • Geostationary Transfer Orbit
    8890.0 kg
  • Direct Geostationary
    3850.0 kg
  • Sun-Synchronous Capacity

United Launch Alliance

United Launch Alliance

(ULA)

CEO: Mark Peller Founded: 2006 Successes: 175 Failures: 0 Pending: 36

Agency Type:

United Launch Alliance (ULA) is a joint venture of Lockheed Martin Space Systems and Boeing Defense, Space & Security. ULA was formed in December 2006 by combining the teams at these companies which provide spacecraft launch services to the government of the United States. ULA launches from both coasts of the US. They launch their Atlas V vehicle from LC-41 in Cape Canaveral and LC-3E at Vandeberg. Their Delta IV launches from LC-37 at Cape Canaveral and LC-6 at Vandenberg.

INFO WIKI
Spaceflight Now

Live coverage: ULA to launch 29 Amazon Leo satellites on Atlas 5 rocket from Cape Canaveral

The mission, dubbed Amazon Leo 6 by United Launch Alliance and Leo Atlas 6 (LA-06) by Amazon Leo, is the 10th batch of production satellites launched to orbit. Liftoff from pad 41 at Cape Canaveral Space Force Station is scheduled for 8:52…

NASASpaceflight

Launch Preview: Falcon Heavy returns, Atlas V and Ariane 6 to launch Amazon Leo satellites

Six launches are expected from Florida, California, and French Guiana this week, with SpaceX scheduled… The post Launch Preview: Falcon Heavy returns, Atlas V and Ariane 6 to launch Amazon Leo satellites appeared first on NASASpaceFlight.…

Cape Canaveral SFS, FL, USA

Space Launch Complex 41


Long March 2D
Success
10 hours, 13 minutes ago
PIESAT-2 13-16
Launch Complex 9 - Taiyuan Satellite Launch Center, People's Republic of China

4 X-band synthetic-aperture radar Earth observation satellites for the Chinese Earth observation satellite company PIESAT.


Electron
Success
17 hours, 41 minutes ago
Owl By The Dozen (StriX Launch 12)
Rocket Lab Launch Complex 1B - Rocket Lab Launch Complex 1, Mahia Peninsula, New Zealand

Synthetic aperture radar satellite for Japanese Earth imaging company Synspective.


Soyuz 2.1b/Fregat-M
Success
2 days, 4 hours ago
Glonass-K1 No. 20 (?)
43/3 (43L) - Plesetsk Cosmodrome, Russian Federation

Note: Satellite serial number and Cosmos designation not confirmed. Glonass-K are the third generation of satellite design for GLONASS satellite n…


Kuaizhou 11
Success
2 days, 18 hours ago
SpaceTY-51 & 52
Launch Area 95A - Jiuquan Satellite Launch Center, People's Republic of China

2 Earth observation radar satellites built by the Chinese satellite manufacturer SpaceTY.


Falcon 9
Success
2 days, 19 hours ago
USSF-259
Space Launch Complex 4E - Vandenberg SFB, CA, USA

USSF-259 is a classified mission for the United States Space Force. It is possibly a batch of classified LEO satellites based on SpaceX’s Starshield …


Long March 12
Success
2 days, 20 hours ago
SatNet LEO Group 25
Commercial LC-2 - Wenchang Space Launch Site, People's Republic of China

A batch of 9 Low Earth Orbit communication satellites for the Chinese state owned SatNet constellation operated by the China Satellite Network Group.…


Soyuz 2.1b
Success
3 days, 7 hours ago
Progress MS-35 (96P)
31/6 - Baikonur Cosmodrome, Republic of Kazakhstan

Progress resupply mission to the International Space Station.


Gravity-1
Success
3 days, 23 hours ago
SpaceSail Polar Group #16
Yellow Sea (launch location 5) - Haiyang Oriental Spaceport

9 Low Earth Orbit communication satellites with Ku, Q and V band payloads for the G60 constellation operated by Shanghai Spacesail Technologies with …


Zhuque-2E Block 2
Success
4 days, 14 hours ago
SpaceSail Polar Group #15
Launch Area 96A - Jiuquan Satellite Launch Center, People's Republic of China

10 Low Earth Orbit communication satellites with Ku, Q and V band payloads for the G60 constellation operated by Shanghai Spacesail Technologies with…


Vega-C
Success
4 days, 19 hours ago
Sentinel-3C & FLEX
Ariane Launch Area 1 (ELV) - Guiana Space Centre, French Guiana

Sentinel-3C is the third satellite in the Sentinel-3 constellation, which provides high-accuracy optical, radar and altimetry data for marine and lan…