Mission Timeline COUNTDOWN (all times are approximate and adjustments may occur prior to launch) Hour/Min/Sec Events -04:15:00 Crew weather brief -04:05:00 Crew handoff -04:00:00 Suit donning and checkouts -03:22:00 Crew Walk Out from Neil Armstrong Operations and Checkout Building -03:15:00 Crew Transportation to Launch Complex 39A -02:55:00 Crew arrives at pad -02:35:00 Crew ingress -02:20:00 Communication check -02:15:00 Verify ready for seat rotation -02:14:00 Suit leak checks -01:55:00 Hatch close -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) +00:08:52 1st stage entry burn +00:09:22 1st stage landing +00:12:00 Crew Dragon separates from 2nd stage +00:12:46 Dragon nosecone open sequence begins