This will be the second orbital tour of duty for this Falcon 9 first stage. The booster helped launch SpaceX's Dragon cargo capsule toward the International Space Station in April 2016, then came down for a pinpoint landing on a robotic "drone ship" in the Atlantic Ocean about 8 minutes after liftoff.
The first stage will attempt another drone-ship landing this evening, SpaceX representatives have said.
Such touchdowns are part of SpaceX's quest to develop rapidly reusable rockets, a technology that company founder and CEO Elon Musk has said could spur a spaceflight revolution by slashing costs. SpaceX has landed eight Falcon 9 first stages to date, but this evening's mission marks the first flight of a used booster.
The SES-10 satellite will be operated by Luxembourg-based company SES, and will provide broadcast services to people across Latin America.
This evening's launch will be SpaceX's third from Kennedy Space Center's historic Launch Complex 39A, which hosted most of NASA's Apollo moon mission and space shuttle liftoffs. SpaceX signed a 20-year lease to use the pad in 2014.