Falcon 9 Block 5 | NROL-136

Timeline

Times are relative to liftoff (T 0:00) and follow the current launch time.

1. T−38:0038 minutes before liftoff: GO for Prop Load Launch director verifies go for propellant load
2. T−35:0035 minutes before liftoff: Prop Load Start of propelland loading
3. T−35:0035 minutes before liftoff: Stage 1 LOX Load Start of liquid oxygen loading in the first stage
4. T−16:0016 minutes before liftoff: Stage 2 LOX Load Start of liquid oxygen loading in the second stage
5. T−7:007 minutes before liftoff: Engine Chill Start of engine chilling
6. T−1:001 minute before liftoff: Startup The onboard computer takes control over the countdown and runs last checks
7. T−1:001 minute before liftoff: Tank Press Fuel tanks are pressurized to flight levels
8. T−0:4545 seconds before liftoff: GO for Launch Launch director verifies go for launch
9. T−0:033 seconds before liftoff: Ignition Start of the engine ignition sequence
10. T 0:00at liftoff: Liftoff First upwards movement of the rocket
11. T+1:021 minute 2 seconds after liftoff: Max-Q Maximum dynamic pressure
12. T+2:112 minutes 11 seconds after liftoff: MECO Cut-off of the main engine
13. T+2:142 minutes 14 seconds after liftoff: Stage 2 Separation Separation of the second stage from the first
14. T+2:222 minutes 22 seconds after liftoff: SES-1 First start of the second engine
15. T+2:272 minutes 27 seconds after liftoff: Booster Boostback Burn Startup Start of the booster boostback burn
16. T+2:592 minutes 59 seconds after liftoff: Fairing Separation Separation of the payload fairing
17. T+3:223 minutes 22 seconds after liftoff: Booster Boostback Burn Shutdown End of the booster boostback burn
18. T+5:535 minutes 53 seconds after liftoff: Entry Burn Startup Start of the atmospheric entry burn
19. T+6:106 minutes 10 seconds after liftoff: Entry Burn Shutdown End of the atmospheric entry burn
20. T+7:097 minutes 9 seconds after liftoff: Stage 1 Landing Burn Start of the first stage landing burn
21. T+7:347 minutes 34 seconds after liftoff: Stage 1 Landing Landing of the first stage