Today’s Countdown


Launch Day will soon dawn here at NASA’s Kennedy Space Center in Florida where a SpaceX Falcon 9 rocket and Dragon spacecraft stand at Launch Complex 39A for today’s liftoff on a mission delivering supplies and science gear to the International Space Station. The forecast continues to call for a 70 percent chance of acceptable conditions at launch time, set for 10:01 a.m. EST.  Our continuous countdown and launch coverage will begin at 8:30 a.m. here and on NASA TV.

Launch and mission operations teams from SpaceX and NASA will be on station throughout the countdown and ascent into space. After reaching orbit and separating from the Falcon 9 rocket, the Dragon spacecraft will take about two days to catch up with the space station. The robotic arm on the station will be used to capture the uncrewed spacecraft and move it into position on a docking port on the orbiting laboratory.

Here is how this morning’s countdown will proceed:
T- 01:18:00                Launch Conductor takes launch readiness poll
– 00:70:00                  RP-1 (rocket grade kerosene) loading underway
– 00:45:00                  LOX (liquid oxygen) loading underway
– 00:07:00                  Falcon 9 begins engine chill prior to launch
– 00:02:00                  Range Control Officer (USAF) verifies range is go for launch
– 00:01:30                  SpaceX Launch Director verifies go for launch
– 00:01:00                  Command flight computer to begin final prelaunch checks
– 00:01:00                  Pressurize propellant tanks
– 00:00:03                  Engine controller commands engine ignition sequence to start
00:00:00                   Falcon 9 liftoff

Photo credit: SpaceX

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