WASHINGTON — SpaceX launched the all-electric SES-12 telecom satellite June 4 on a Falcon 9 rocket that combined two generations of the rocket.
Featuring a pre-flown Block 4 first stage and the new Block 5 upper stage, the Falcon 9 rocket lifted off from Cape Canaveral Air Force Base at 12:45 a.m. Eastern.
The 5.4 metric-ton SES-12 satellite separated from the rocket’s upper stage 32 minutes later.
Described by manufacturer Airbus Defence and Space as “the largest and most powerful all-electric satellite ever produced,” SES-12 carries six wide-beam and 72 high-throughput spot-beam transponders for television and connectivity services across the Asia Pacific and the Middle East.
The satellite should have enough fuel to last 22 years in orbit — seven longer than the design life of most geostationary spacecraft — thanks to the effectiveness of the Block 5 upper stage, according to SES Chief Technology Officer Martin Halliwell as quoted in Florida Today.
The Ku- and Ka-band satellite has a digital processor to flexibly allocate capacity according to customer demand — a feature satellite operators are increasingly demanding to prevent geostationary spacecraft from losing their efficacy as markets change over time.
The first-stage booster used today first launched Sept. 7 with the Air Force’s secretive Orbital Test Vehicle 5 spaceplane. SpaceX did not seek to recover the booster or the payload fairings.
SES-12 was originally to launch on an Ariane 5 rocket from European launch provider Arianespace, but SES switched the satellite with one of its SpaceX missions in August. Luxembourg-based SES used that Ariane 5 to instead launch SES-14, a satellite needed on an expedited schedule to replace the malfunctioning NSS-806.
An Arianespace Ariane 5 anomaly eliminated the weeks of schedule saving that SES hoped to obtain by switching missions. A trajectory deviation with Ariane 5 sent SES-14 into the wrong orbit, requiring an estimated four weeks of additional maneuvering with onboard propellant to reach its geostationary slot.
SpaceX’s SES-12 mission was supposed to occur by the end of March but was delayed until June.
SES-12 is a replacement for the 15-and-a-half-year-old NSS-6 satellite. SES plans to co-locate SES-12 with SES-8 at 95 degrees east.



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