Key Milestones to Keep in Mind for NASA’s SpaceX Crew-4 Mission

Below are some of the key milestones leading up to the launch of NASA’s SpaceX Crew-4 mission, as well as some critical events that occur after liftoff. The SpaceX Falcon 9 rocket and Crew Dragon spacecraft are scheduled to lift off just a little more than four hours from now at 3:52 a.m. EDT from Kennedy Space Center’s historic Launch Complex 39A in Florida.

  • 12:32 a.m. Crew walkout from Neil Armstrong Operations & Checkout Building
  • 1:22 a.m. Crew arrival at Launch Complex 39A
  • 1:37 a.m. Crew ingress into Freedom
  • 1:57 a.m. Freedom hatch closure
  • 2:43 a.m. Mission Director Go/No-Go poll for propellant loading
  • 2:48 a.m. Final Go/No-Go for propellant loading
  • 3:10 a.m. Crew access arm retracts
  • 3:14 a.m. Dragon launch escape system is armed
  • 3:17 a.m. Falcon 9 propellant loading begins
  • 3:48 a.m. Strongback retraction
  • 3:50 a.m. Falcon 9 propellant load complete and vehicle transitions to internal power
  • 3:52 a.m. Liftoff!
  • 4:01 a.m. Falcon 9 second stage engine cutoff (SECO)
  • 4:04 a.m. Crew Dragon separation from Falcon 9
  • 4:05 a.m. Crew Dragon nosecone deploy