Watch the Launch

Additional Media

Atlas V SES-20 SES-21

A United Launch Alliance (ULA) Atlas V 531 rocket will launch the SES-20 and SES-21 satellites into near-geosynchronous orbit to provide television broadcasting services across the United States. The commercial dual-payload launch is in service to satellite operator SES of Luxembourg. Liftoff will o...

SES-20 & SES-21

Overview

Destination: Geostationary Orbit
Mission: Communications

Geostationary Orbit Space Launch Complex 41 Cape Canaveral SFS, FL, USA Probability: 90%

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.

Telemetry

Launch trajectory and telemetry simulations provided by Flight Club - a rocket launch simulator and orbital trajectory visualiser for all things space!

Updates

Cosmic_Penguin • Oct. 5, 2022, 4:37 a.m.

Launch success


SwGustav • Oct. 4, 2022, 9:36 p.m.

Liftoff


SwGustav • Oct. 4, 2022, 9:16 p.m.

Coverage live


Nosu • Oct. 4, 2022, 3:56 p.m.

Weather 90%



Atlas V 531

Family:
Configuration: 531

Atlas V with 5m Fairing, 3 SRB, 1 Centaur upper stage engine.

Specifications
  • Max Stage
    2
  • Length
    60.0 m
  • Diameter
    3.8 m
  • Fairing Diameter
  • Launch Mass
    479.0 T
  • Thrust
Family
  • Name
    Atlas V 531
  • Family
  • Variant
    531
  • Alias
  • Full Name
    Atlas V 531
Payload Capacity
  • Launch Cost
    $140000000
  • Low Earth Orbit
    15530.0 kg
  • Geostationary Transfer Orbit
    7450.0 kg
  • Direct Geostationary
    3080.0 kg
  • Sun-Synchronous Capacity

United Launch Alliance

United Launch Alliance

(ULA)

CEO: Tory Bruno Founded: 2006 Successes: 166 Failures: 0 Pending: 43

Agency Type:

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.

INFO WIKI

Related News

Spaceflight Now

Atlas 5 rocket completes high-altitude tandem satellite delivery for SES

Running a few days late after a delay caused by Hurricane Ian, an Atlas 5 rocket built by United Launch Alliance thundered off a launch pad at Cape Canaveral Tuesday and soared to an altitude of nearly 22,000 miles to deploy two commercial…

NASASpaceflight

Final Atlas V 531 launches dual SES-20 and SES-21 satellites

United Launch Alliance (ULA) has launched the dual-manifested SES-20 & 21 telecommunication satellites on the final Atlas V 531 rocket to a near-circular geosynchronous orbit (GSO). The Atlas V launched from Space Launch Complex-41 (SLC-41…

Spaceflight Now

Atlas 5 rocket rolls launch pad at Cape Canaveral with two SES comsats

United Launch Alliance hauled an Atlas 5 rocket to its launch pad Monday at Cape Canaveral on the eve of a planned blastoff with two commercial television broadcasting satellites for SES, owner of one of the largest fleets of geostationary…

Arstechnica

Florida’s Space Coast on track after Ian, set for 3 launches in 3 days

Managers will assess the scope of work to perform while in the VAB.

Spaceflight Now

SpaceX, ULA postpone launches as Hurricane Ian moves toward Florida

The forecast track of Hurricane Ian across Central Florida has forced SpaceX and United Launch Alliance to postpone several launches planned in the coming days at Cape Canaveral, including the next crew flight to the International Space St…

Cape Canaveral SFS, FL, USA

Space Launch Complex 41


Falcon 9
Success
6 hours, 38 minutes ago
Starlink Group 17-3
Space Launch Complex 4E - Vandenberg SFB, CA, USA

A batch of 24 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.


Falcon 9
Success
3 days, 4 hours ago
Project Kuiper (KF-01)
Space Launch Complex 40 - Cape Canaveral SFS, FL, USA

First of a three launches contract for Amazon's Kuiper low Earth orbit satellite internet constellation, with 24 satellites on board.


Falcon 9
Success
3 days, 8 hours ago
Starlink Group 15-2
Space Launch Complex 4E - Vandenberg SFB, CA, USA

A batch of 26 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.


Long March 7
Success
4 days, 12 hours ago
Tianzhou-9
201 - Wenchang Space Launch Site, People's Republic of China

Eighth cargo delivery mission to the Chinese space station.


Falcon 9
Success
6 days, 5 hours ago
Dror-1
Space Launch Complex 40 - Cape Canaveral SFS, FL, USA

Note: SpaceX identifies the mission as "Commercial GTO 1". Dror-1 is a geostationary communication satellite built and developed by Israel Aerospa…


Falcon 9
Success
1 week, 4 days ago
Starlink Group 10-28
Space Launch Complex 40 - Cape Canaveral SFS, FL, USA

A batch of 28 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.


Soyuz 2.1a
Success
2 weeks, 1 day ago
Progress MS-31 (92P)
31/6 - Baikonur Cosmodrome, Republic of Kazakhstan

Progress resupply mission to the International Space Station.


Long March 4C
Success
2 weeks, 2 days ago
Shiyan 28 B-01
Launch Complex 3 (LC-3/LA-1) - Xichang Satellite Launch Center, People's Republic of China

Satellite officially named for "space environment detection" purposes, exact details unknown.


Falcon 9
Success
2 weeks, 3 days ago
Starlink Group 10-25
Space Launch Complex 40 - Cape Canaveral SFS, FL, USA

A batch of 27 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.


Falcon 9
Success
2 weeks, 3 days ago
MTG-S1
Launch Complex 39A - Kennedy Space Center, FL, USA

Second of EUMETSAT's third generation of weather satellite.