Ascent COUNTDOWN (all times are approximate and adjustments may occur prior to launch) Hour/Min/Sec Events -00:45:00 SpaceX Launch Director verifies go for propellant load -00:42:00 Crew access arm retracts -00:37:00 Dragon launch escape system is armed -00:35:00 RP-1 (rocket grade kerosene) loading begins -00:35:00 1st stage LOX (liquid oxygen) loading begins -00:16:00 2nd stage LOX loading begins -00:07:00 Falcon 9 begins engine chill prior to launch -00:05:00 Dragon transitions to internal power -00:01:00 Command flight computer to begin final prelaunch checks -00:01:00 Propellant tank pressurization to flight pressure begins -00:00:45 SpaceX Launch Director verifies go for launch -00:00:03 Engine controller commands engine ignition sequence to start -00:00:00 Falcon 9 liftoff LAUNCH, LANDING AND DRAGON DEPLOYMENT (all times are approximate and adjustments may occur prior to launch) Hour/Min/Sec Events +00:00:58 Max Q (moment of peak mechanical stress on the rocket) +00:02:33 1st stage main engine cutoff (MECO) +00:02:36 1st and 2nd stages separate +00:02:44 2nd stage engine starts +00:07:15 1st stage entry burn +00:08:47 2nd stage engine cutoff (SECO-1)