SpaceX CRS-20 Mission Timeline

The SpaceX Falcon 9 rocket and Drago cargo spacecraft are on Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida on March 6, 2020.
The SpaceX Falcon 9 rocket with the Dragon cargo spacecraft are on the pad at Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida. The company’s 20th commercial resupply services (CRS-20) mission to the International Space Station is scheduled to launch at 11:50 p.m. EST tonight, March 6. Photo credit: NASA

COUNTDOWN (all times approximate)
Hour/Min/Sec   Events
– 00:38:00     SpaceX Launch Director verifies go for propellant load
– 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
– 00:07:58     Dragon transitions to internal power
– 00:07:00     Falcon 9 begins pre-launch engine chill
– 00:01:00     Command flight computer to begin final prelaunch checks
– 00:01:00     Propellant tanks pressurize for flight
– 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 AND DRAGON DEPLOYMENT
Hour/Min/Sec   Events
– 00:01:18     Max Q (moment of peak mechanical stress on the rocket)
– 00:02:18     1st stage main engine cutoff (MECO)
– 00:02:22     1st and 2nd stages separate
– 00:02:29     2nd stage engine starts
– 00:02:35     1st stage boostback burn begins
– 00:06:32     1st stage entry burn begins
– 00:08:17     1st stage landing
– 00:08:35     2nd stage engine cutoff (SECO)
– 00:09:35     Dragon separates from 2nd stage
– 00:12:02     Dragon’s solar arrays deploy
– 02:19:00     Dragon’s Guidance, Navigation and Control bay door opens

Learn more about station activities by following @space_station and @ISS_Research on Twitter as well as the ISS Facebook and ISS Instagram accounts.

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