SpaceX’s Falcon 9 rocket is set for liftoff from Cape Canaveral on Thursday evening, heading due east over the Atlantic Ocean to deliver the SES 10 communications satellite into orbit 32 minutes later.
The 229-foot-tall (70-meter) rocket is poised for launch from pad 39A at NASA’s Kennedy Space Center in Florida at 6:27 p.m. EDT (2227 GMT) Thursday at the opening of a 150-minute launch window.
Perched atop the rocket is the SES 10 communications satellite, a spacecraft made by Airbus Defense and Space, ready to beam television programming and data services across Latin America. The rocket will place the satellite into a high-altitude geosynchronous transfer orbit.
The timeline below outlines the launch sequence for the Falcon 9 flight with SES 10, SpaceX’s first launch with a previously-flown first stage booster.
Data source: SpaceX
T-0:00:00: Liftoff
After the rocket’s nine Merlin engines pass an automated health check, hold-down clamps will release the Falcon 9 booster for liftoff from pad 39A.
T+0:01:13: Mach 1
The Falcon 9 rocket reaches Mach 1, the speed of sound, as the nine Merlin 1D engines provide more than 1.7 million pounds of thrust.
T+0:01:22: Max Q
The Falcon 9 rocket reaches Max Q, the point of maximum aerodynamic pressure.
T+0:02:38: MECO
The Falcon 9’s nine Merlin 1D engines shut down.
T+0:02:41: Stage 1 Separation
The Falcon 9’s first stage separates from the second stage moments after MECO.
T+0:02:49: First Ignition of Second Stage
The second stage Merlin 1D vacuum engine ignites for a nearly 6-minute burn to put the rocket and SES 10 into a preliminary parking orbit.
T+0:03:49: Fairing Jettison
The 5.2-meter (17.1-foot) diameter payload fairing jettisons once the Falcon 9 rocket ascends through the dense lower atmosphere. The 43-foot-tall fairing is made of two clamshell-like halves composed of carbon fiber with an aluminum honeycomb core.
T+0:06:19: Stage 1 Entry Burn
A subset of the first stage’s Merlin 1D engines ignite for an entry burn to slow down for landing. A final landing burn will occur just before touchdown.
T+0:08:32: Stage 1 Landing
The Falcon 9 rocket’s first stage booster touches down on SpaceX’s drone ship in the Atlantic Ocean.
T+0:08:34: SECO 1
The second stage of the Falcon 9 rocket shuts down after reaching a preliminary low-altitude orbit. The upper stage and SES 10 begin a coast phase scheduled to last nearly 18 minutes before the second stage Merlin vacuum engine reignites.
T+0:26:29: Second Ignition of Second Stage
The Falcon 9’s second stage Merlin engine restarts to propel the SES 10 communications satellite into a geostationary transfer orbit.
T+0:27:22: SECO 2
The Merlin engine shuts down after a short burn to put the SES 10 satellite in the proper orbit for deployment. The on-board computer will target an orbit with a low point of 135 miles (218 kilometers), a high point of 22,002 miles (35,410 kilometers), and an inclination of 26.2 degrees.
T+0:32:03: SES 10 Separation
The SES 10 satellite separates from the Falcon 9 rocket in a geostationary transfer orbit.
A United Launch Alliance Atlas 5 rocket lifted off from Cape Canaveral’s Complex 41 launch pad Sunday night with the European Space Agency’s Solar Orbiter mission, a project developed in partnership with NASA. Launch occurred right on time at the opening of a two-hour window at 11:03 p.m. EST Sunday (0403 GMT Monday).
The U.S. Air Force announced Tuesday that SpaceX is now eligible to compete for launches of U.S. national security satellites, closing a tumultuous chapter in the U.S. rocket industry and ending the Pentagon’s sole reliance on United Launch Alliance to haul military payloads into orbit.
Former NASA astronaut Peggy Whitson, with more time in space than any other American, rocketed back into orbit for the fourth time Sunday, riding a SpaceX Falcon 9 launcher from Florida with a fare-paying investor and private pilot, and the first two Saudi Arabian astronauts to fly to the International Space Station.
