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United Launch AllianceAtlas V 551Space Launch Complex 41, Cape Canaveral SFS, FL, USA
Amazon Leo (LA-05)
Launched
April 4, 2026 · 05:46 UTC
Summary
Amazon Leo (LA-05) launched on an United Launch Alliance Atlas V 551 from Space Launch Complex 41, Cape Canaveral SFS, FL, USA on April 4, 2026 at 05:46 UTC. The launch window ran from 05:45 to 06:14 UTC. It was United Launch Alliance's 172nd launch, 2nd this year and humanity's 7,250th orbital launch attempt. It was the 20th Atlas V 551 flight and the 1st this year. The payload was bound for low Earth orbit (LEO). The tracked orbit of Kuiper-00131, one of 29 catalogued objects, from April 9, 2026, was 457 × 467 km inclined 51.9°. 29 objects from this launch are catalogued, all of them payloads.
- Watch
- Rocket Launch: Amazon Leo 5United Launch Alliance
- Watch live: ULA Atlas 5 rocket launches 29 Amazon Leo satellites from Cape CanaveralSpaceflight Now
- ULA Atlas V 551 launches Amazon Leo Atlas 5 (LA-05)NASASpaceflight
- Booster
- No booster details on record.
- Mission
- Communications · Low Earth Orbit (LEO)for Amazon
- Milestone
- 20th Atlas V 551 flight · 1st this yearUnited Launch Alliance's 172nd launch2nd this yearhumanity's 7,250th orbital launch attempt77th orbital launch attempt this year
Webcast
Flight preview
Simulate in Flight ClubOrbit: as tracked
Kuiper-00131 · NORAD 68573 · 2026-072 · Space-Track · tracking 1 of 29 objects
Show the numbers for orbit elements
- Object
- KUIPER-00131
- Object ID
- 2026-072A
- Epoch
- 2026-04-09 12:06:07 UTC
- Mean motion
- 15.37035521 rev/day
- Eccentricity
- 0.0006957
- Inclination
- 51.8689°
- Ascending node
- 149.099°
- Arg. of perigee
- 121.8629°
- Mean anomaly
- 238.3035°
- Element set
- 999
- Rev at epoch
- 81
- B*
- 0.00052551
Perigee, apogee and period are Kepler figures from the catalogued mean elements, not a propagated state. Published orbit: LEO.
Flight timeline
- T−2.7SIgnition
- T+1SLiftoff
- T+34.9SSupersonic
- T+52.8SMax-Q
- T+1M46.6SBoosters Separation
- T+3M5.2SFairing Separation
- T+4M21.9SBECO
- T+4M27.9SStage 2 Separation
- T+4M37.9SSES-1
- T+18M21SSECO-1
- T+21M10SPayload Deployment Sequence Start
- T+37M41SPayload Deployment Sequence End
- T+54M52.6SSES-2
- T+55M2.3SSECO-2
Catalogued objects
29 catalogued: 29 payloads; 29 still in orbit
- Kuiper-00131 · NORAD 68573 · in orbit
- Kuiper-00189 · NORAD 68574 · in orbit
- Kuiper-00192 · NORAD 68575 · in orbit
- Kuiper-00193 · NORAD 68576 · in orbit
- Kuiper-00194 · NORAD 68577 · in orbit
- Kuiper-00229 · NORAD 68578 · in orbit
- Kuiper-00230 · NORAD 68579 · in orbit
- Kuiper-00231 · NORAD 68580 · in orbit
- Kuiper-00234 · NORAD 68581 · in orbit
- Kuiper-00236 · NORAD 68582 · in orbit
- Kuiper-00244 · NORAD 68583 · in orbit
- Kuiper-00253 · NORAD 68584 · in orbit
Show 17 more payloads
- Kuiper-00254 · NORAD 68585 · in orbit
- Kuiper-00263 · NORAD 68586 · in orbit
- Kuiper-00269 · NORAD 68587 · in orbit
- Kuiper-00272 · NORAD 68588 · in orbit
- Kuiper-00285 · NORAD 68589 · in orbit
- Kuiper-00286 · NORAD 68590 · in orbit
- Kuiper-00289 · NORAD 68591 · in orbit
- Kuiper-00290 · NORAD 68592 · in orbit
- Kuiper-00293 · NORAD 68593 · in orbit
- Kuiper-00294 · NORAD 68594 · in orbit
- Kuiper-00296 · NORAD 68595 · in orbit
- Kuiper-00297 · NORAD 68596 · in orbit
- Kuiper-00300 · NORAD 68597 · in orbit
- Kuiper-00301 · NORAD 68598 · in orbit
- Kuiper-00304 · NORAD 68599 · in orbit
- Kuiper-00317 · NORAD 68600 · in orbit
- Kuiper-00320 · NORAD 68601 · in orbit
Data from J. McDowell, planet4589.org
About this launch
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.
Pad
Space Launch Complex 41, Cape Canaveral SFS, FL, USA
122nd launch from Space Launch Complex 41, 2nd this year · 1,100th from Cape Canaveral SFS, FL, USA
Local pad time at liftoff: Apr 4, 1:46 AM EDT, at night
125 launches from this pad · 1,131 from Cape Canaveral SFS, FL, USA
50 days after the previous launch from this pad
Updates
Launch success.
Show 9 earlier updates
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
Questions
When did Amazon Leo (LA-05) launch?
Amazon Leo (LA-05) launched on April 4, 2026 at 05:46 UTC. The launch window ran from 05:45 to 06:14 UTC.
Where can I watch Amazon Leo (LA-05)?
Coverage: Rocket Launch: Amazon Leo 5; Watch live: ULA Atlas 5 rocket launches 29 Amazon Leo satellites from Cape Canaveral; ULA Atlas V 551 launches Amazon Leo Atlas 5 (LA-05). Watch the replay
What rocket launched Amazon Leo (LA-05)?
Atlas V 551, flown by United Launch Alliance. Atlas V 551 spec sheet
Where did Amazon Leo (LA-05) launch from?
Space Launch Complex 41, Cape Canaveral SFS, FL, USA. Liftoff was Apr 4, 1:46 AM EDT local time at the pad.
What orbit did Amazon Leo (LA-05) reach?
The tracked orbit of Kuiper-00131, one of 29 catalogued objects, from April 9, 2026, was 457 × 467 km inclined 51.9°.
How many satellites did Amazon Leo (LA-05) launch?
29 payloads from this launch are catalogued, 29 of them still in orbit (Data from J. McDowell, planet4589.org).
Which program is Amazon Leo (LA-05) part of?
Amazon Leo. About Amazon Leo