Amazon Leo (LA-04)

Mission

Amazon Leo (LA-04) on Atlas V 551. Tue 16 Dec 2025, 08:28 UTC. Reported outcome: Success. Launch site: Space Launch Complex 41. Source: Launch Library 2.

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. 27 satellites are carried on this launch.

Mission type

Communications

Orbit

Low Earth Orbit

Programmes: Amazon Leo

Launch-site file imagery

Launch timeline

Times are relative to liftoff. Clock times are not shown while T-0 is unconfirmed or on hold.

1. T-2.7 s

   Ignition

   Start of the engine ignition sequence

2. T+1 s

   Liftoff

   First upwards movement of the rocket

3. T+34.7 s

   Supersonic

   Vehicle is supersonic

4. T+52.7 s

   Max-Q

   Maximum dynamic pressure

5. T+1 min 46.6 s

   Boosters Separation

   Separation of the side boosters

6. T+3 min 4.7 s

   Fairing Separation

   Separation of the payload fairing

7. T+4 min 22.8 s

   BECO

   Booster Engine Cutoff

8. T+4 min 28.8 s

   Stage 2 Separation

   Separation of the second stage from the first

9. T+4 min 38.8 s

   SES-1

   First start of the second engine

10. T+17 min 32.8 s

    SECO-1

    First cut-off of the second engine

11. T+20 min 21.8 s

    Payload Deployment Sequence Start

    Start of the payload deployment sequence

12. T+35 min 11.8 s

    Payload Deployment Sequence End

    End of the payload deployment sequence.

13. T+54 min 14.7 s

    SES-2

    Second start of the second engine

14. T+54 min 25.7 s

    SECO-2

    Second cut-off of the second engine

15. T+1 h 9 min 0.7 s

    Mission End

    End of the launch vehicle's mission

Slip history

Changes recorded by Space Right Now

No changes since we started tracking on Sat 10 Oct 2026, 11:18 UTC.

Launch pad

Space Launch Complex 41

Cape Canaveral SFS, FL, USA (US)

Coordinates: 28.58341025, -80.58303644