Atlas V 551 | Amazon Leo (LA-06)
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.
Launch Vehicle
Atlas V
Atlas V is ULA's expendable medium-to-heavy lift rocket, first launched in 2002. Its near-perfect reliability record — 100+ consecutive successful missions — made it one of the most trusted launch vehicles in history. The Russian-built RD-180 first-stage engine delivers exceptional specific impulse, and the Centaur upper stage with its RL-10 engine provides precise orbit insertion. Atlas V is being retired in favour of Vulcan Centaur.
58.3 m (191 ft)
3.81 m (12.5 ft) core
18,850 kg
8,900 kg
2
August 21, 2002
Engines
1× RD-180 (first stage), 1× RL-10C-1 (Centaur upper stage), 0–5× AJ-60A solid strap-ons
Propellant
RP-1 / Liquid Oxygen (first stage); Liquid Hydrogen / Liquid Oxygen (upper stage)
Reusable
ExpendableNotable
- Flawless mission success rate across more than 100 flights
- Launched NASA's New Horizons (Pluto), Curiosity Mars rover, OSIRIS-REx, and Lucy
- Delivered Boeing Starliner crew on its crewed flight demonstration
- Being retired and replaced by Vulcan Centaur
T-Minus
Instantaneous
This mission has a zero-second launch window. The rocket must lift off at the exact planned second — if it misses for any reason, the launch is scrubbed and rescheduled. Instantaneous windows are typical for missions that must match a precise orbital plane (e.g. ISS rendezvous) or hit a narrow interplanetary trajectory.
17 days out
Weather forecasts beyond 4 days are too unreliable for launch planning. Check back closer to launch time.
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Space Launch Complex 41, Cape Canaveral SFS, FL
Launch data via TheSpaceDevs Launch Library. Weather estimates via Open-Meteo using vehicle-specific commit criteria. Always verify with the launch provider.