Amazon Leo (KA-01)

Mission

Amazon Leo (KA-01) on Atlas V 551. Mon 28 Apr 2025, 23:01:00 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.

1. T-2.7 sTue 29 Apr, 01:00 CEST

   Ignition

   Start of the engine ignition sequence

2. T+1 sTue 29 Apr, 01:01 CEST

   Liftoff

   First upwards movement of the rocket

3. T+4.1 sTue 29 Apr, 01:01 CEST

   Supersonic

   Vehicle is supersonic

4. T+34.6 sTue 29 Apr, 01:01 CEST

   Max-Q

   Maximum dynamic pressure

5. T+45.6 sTue 29 Apr, 01:01 CEST

   Boosters Separation

   Separation of the side boosters

6. T+3 min 4.8 sTue 29 Apr, 01:04 CEST

   Fairing Separation

   Separation of the payload fairing

7. T+4 min 23.1 sTue 29 Apr, 01:05 CEST

   BECO

   Booster Engine Cutoff

8. T+4 min 29.1 sTue 29 Apr, 01:05 CEST

   Stage 2 Separation

   Separation of the second stage from the first

9. T+4 min 39 sTue 29 Apr, 01:05 CEST

   SES-1

   First start of the second engine

10. T+18 min 14.9 sTue 29 Apr, 01:19 CEST

    SECO-1

    First cut-off of the second engine

Slip history

Changes recorded by Space Right Now

No changes since we started tracking on Sat 10 Oct 2026, 11:14 UTC.

Launch pad

Space Launch Complex 41

Cape Canaveral SFS, FL, USA (US)

Coordinates: 28.58341025, -80.58303644