Atlas V 551 | Amazon Leo (LA-05)

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.

Communications · Low Earth Orbit (LEO)

No booster details available.

• Rocket Launch: Amazon Leo 5 — United Launch Alliance
• Watch live: ULA Atlas 5 rocket launches 29 Amazon Leo satellites from Cape Canaveral — Spaceflight Now
• ULA Atlas V 551 launches Amazon Leo Atlas 5 (LA-05) — NASASpaceflight

1. T−2.7SIgnition
2. T+1SLiftoff
3. T+34.9SSupersonic
4. T+52.8SMax-Q
5. T+1M46.6SBoosters Separation
6. T+3M5.2SFairing Separation
7. T+4M21.9SBECO
8. T+4M27.9SStage 2 Separation
9. T+4M37.9SSES-1
10. T+18M21SSECO-1
11. T+21M10SPayload Deployment Sequence Start
12. T+37M41SPayload Deployment Sequence End
13. T+54M52.6SSES-2
14. T+55M2.3SSECO-2

• Launch success.

  Cosmic_Penguin · 4/4/2026 · source

• Liftoff.

  Cosmic_Penguin · 4/4/2026 · source

• Official Webcast by United Launch Alliance has started

  LL2 · 4/4/2026 · source

• New T-0.

  Cosmic_Penguin · 4/4/2026 · source

• Tweaked T-0.

  Cosmic_Penguin · 4/3/2026 · source

• Updated launch weather, 90% GO.

  Cosmic_Penguin · 4/3/2026 · source

• Confirmed rescheduled for April 4.

  Cosmic_Penguin · 4/2/2026 · source

• Delayed to NET April 4 per NOTAMs, to be confirmed.

  Cosmic_Penguin · 3/28/2026 · source

• Delayed due to launch site weather, new launch date TBD.

  Cosmic_Penguin · 3/28/2026 · source

• Updated launch weather, 10% GO.

  Cosmic_Penguin · 3/27/2026 · source