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SES-20 & SES-21

Atlas V 531

United Launch Alliance

Launch Status


SES-20 & SES-21

Type: Communications
Launch Cost: $140,000,000

SES-20 & SES-21 are a pair of C-band communication satellites built by Boeing, using the highly efficient all-electric propulsion BSS-702SP satellite bus.

These satellites will enable SES to clear 280MHz of mid-band spectrum for 5G use while seamlessly migrating SES’s existing C-band customers and ensuring the continued delivery of digital television to nearly 120 million American TV homes and other critical data services.


View the rocket launch trajectory, velocity, altitude, thrust and much more at


Space Launch Complex 41

Cape Canaveral, FL, USA

888 rockets have launched from Cape Canaveral, FL, USA.

Space Launch Complex 41, Cape Canaveral, FL, USA


Atlas V 531 – United Launch Alliance

  • Family: Atlas
  • Length: 60 m
  • Diameter: 3.8 m
  • Launch Mass: 479 T
  • Low Earth Orbit Capacity: 15530 kg

The Atlas V 531 was manufactured by United Launch Alliance with the first launch on 2010-08-14. Atlas V 531 has 5 successful launches and 0 failed launches with a total of 5 launches. Atlas V with 5m Fairing, 3 SRB, 1 Centaur upper stage engine.


United Launch Alliance – ULA

  • Type: Commercial
  • Abbreviation: ULA
  • Administration: CEO: Tory Bruno
  • Founded: 2006
  • Launchers: Atlas | Delta IV | Vulcan
  • Spacecraft: CST-100 Starliner
  • Country: USA

United Launch Alliance (ULA) is a joint venture of Lockheed Martin Space Systems and Boeing Defense, Space & Security. ULA was formed in December 2006 by combining the teams at these companies which provide spacecraft launch services to the government of the United States. ULA launches from both coasts of the US. They launch their Atlas V vehicle from LC-41 in Cape Canaveral and LC-3E at Vandeberg. Their Delta IV launches from LC-37 at Cape Canaveral and LC-6 at Vandenberg.

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