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BEGIN:VEVENT
SUMMARY:Atlas V 551 • Amazon Leo
DTSTART;VALUE=DATE-TIME:20260404T054500Z
DTEND;VALUE=DATE-TIME:20260404T061400Z
UID:131701802916
DESCRIPTION:A United Launch Alliance Atlas V rocket\, designated AV-?\, wi
 ll launch a batch of 29 operational satellites for the Amazon Leo constell
 ation. The mission is known as Leo 5 by ULA and LA-05 by Amazon. Total pay
 load mass will be ~16.7 tonnes. Atlas will deploy the satellites in an ini
 tial orbit of 450km altitude\, the satellites will then use their electric
  propulsion systems to settle into their assigned final orbits. The Amazon
  Leo constellation will enable Internet service for customers between 56 d
 egrees north and south latitude. Atlas will fly in the 551 vehicle configu
 ration with a five-meter medium length fairing\, five GEM-63 solid rocket 
 boosters and a single-engine Centaur upper stage. The Centaur will use an 
 upgraded RL10C-1-1 upper stage engine. The mission will mark the heaviest 
 payload ever launched by Atlas V.\n\nMission profile video: https://youtu.
 be/X9vgY6zKwyM\nhttps://x.com/i/status/2036473607774200205\n-\nOperational
  satellites of the Amazon Leo constellation (formerly known as Project Kui
 per) are a significant upgrade from the two prototype satellites of the Ku
 iper Protoflight mission. The ~572kg satellites are equipped with Hall-eff
 ect thruster technology for propulsion. They feature improved systems and 
 sub-systems on board\, including phased array antennas\, processors\, sola
 r arrays\, propulsion systems\, and optical inter-satellite links. In addi
 tion\, the satellites are coated in a dielectric mirror film unique to Ama
 zon Leo that scatters reflected sunlight to help make them less visible to
  ground-based astronomers. Amazon Leo is planned to work in concert with A
 mazon's network of 12 satellite ground station facilities. In addition to 
 connecting to ground stations\, satellites will interconnect via optical i
 nfrared laser connections. Amazon refers to this technology as OISL (optic
 al inter-satellite link).\nThe Amazon Leo constellation is planned to cons
 ist of 3236 satellites operating in 98 orbital planes in three orbital 
 shells\, one each at 590km\, 610km and 630km orbital altitude. Kuiper sate
 llites will fly in mid-inclination orbits\, enabling Internet service for 
 customers between 56 degrees north and south latitude. Phase 1 of deployme
 nt will be 578 satellites at 630km altitude and an orbital inclination of 
 51.9 degrees. A total of five phases of constellation development are plan
 ned.\n-\nMoved forward from Mar. 30. Delayed from Mar. 29.\n\nWebcast: ht
 tps://www.youtube.com/live/NAKuVmkp5q8\nhttps://www.ulalaunch.com/missions
 /next-launch/atlas-v-amazon-leo-5\n\nhttps://spaceflightnow.com
LOCATION:Cape Canaveral AFS Launch Complex 41\, Titan III Rd\, Titusville\
 , FL 32780\, USA
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