/sci/ - Science & Math

COUNTDOWN
HR/MIN/SEC EVENT
00:38:00 SpaceX Launch Director verifies go for propellant load
00:35:00 RP-1 (rocket grade kerosene) loading underway
00:35:00 1st stage LOX (liquid oxygen) loading underway
00:16:00 2nd stage LOX loading underway
00:07:00 Falcon 9 begins engine chill prior to launch
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 DEPLOYMENT
HR/MIN/SEC EVENT
00:01:12 Max Q (moment of peak mechanical stress on the rocket)
00:02:32 1st stage main engine cutoff (MECO)
00:02:36 1st and 2nd stages separate
00:02:43 2nd stage engine starts
00:03:11 Fairing deployment
00:07:03 1st stage entry burn complete
00:08:42 1st stage landing
00:08:53 2nd stage engine cutoff (SECO-1)
00:12:34 SkySat-18 deployment
00:13:04 SkySat-17 deployment
00:13:34 SkySat-16 deployment
00:26:00 Starlink satellites deploy