Question 1

What rocket is launching SES-20 & SES-21?

Accepted Answer

SES-20 & SES-21 is launching on the Atlas V 531.

Question 2

Who is launching SES-20 & SES-21?

Accepted Answer

SES-20 & SES-21 is being launched by United Launch Alliance, a commercial launch provider founded in 2006.

Question 3

Where is SES-20 & SES-21 launching from?

Accepted Answer

SES-20 & SES-21 is launching from Space Launch Complex 41 at Cape Canaveral SFS, FL, USA.

Question 4

What orbit is SES-20 & SES-21 heading to?

Accepted Answer

SES-20 & SES-21 is heading to Geostationary Orbit (Direct-GEO).

Question 5

Is the Atlas V 531 reusable?

Accepted Answer

No — the Atlas V 531 is an expendable launch vehicle.

Question 6

How many times has the Atlas V 531 flown?

Accepted Answer

The Atlas V 531 has launched 5 times to date, with 5 successful flights.

Question 7

What is the SES-20 & SES-21 mission?

Accepted Answer

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.

Question 8

Where is Cape Canaveral Space Force Station?

Accepted Answer

Cape Canaveral Space Force Station sits on Florida's Atlantic coast, on the Eastern Range run by the U.S. Space Force's Space Launch Delta 45. It is the United States' busiest launch site and has been America's gateway to orbit since the 1950s.

Question 9

Which rockets launch from Cape Canaveral?

Accepted Answer

SpaceX flies Falcon 9 from Space Launch Complex 40, and United Launch Alliance flies the Vulcan Centaur (and the retiring Atlas V) from Space Launch Complex 41.

Question 10

Is Cape Canaveral the same as the Kennedy Space Center?

Accepted Answer

No. Cape Canaveral Space Force Station and NASA's Kennedy Space Center are separate, neighbouring sites — Kennedy is on Merritt Island just to the north. Together they make up Florida's 'Space Coast'.

Question 11

Why do rockets launch from Cape Canaveral?

Accepted Answer

Its pads sit on the Eastern Range, letting rockets fly east out over the Atlantic toward the equatorial and geostationary orbits most commercial and national-security payloads need, away from populated land.

Question 12

Can you watch a launch from Cape Canaveral?

Accepted Answer

Yes — the Space Coast is one of the easiest places in the world to watch a launch from public land. Popular free spots include Playalinda Beach, Space View Park in Titusville, and Jetty Park at Port Canaveral.

SES-20 & SES-21

Overview

Mission details

Atlas V 531 Specs

United Launch Alliance

Space Launch Complex 41

Cape Canaveral SFS, FL, USA

Launch window

Social Flight Log

Photo gallery

Frequently asked questions