Recorded mission
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United Launch Alliance
Atlas V 551 | USSF-51
Recorded mission coverage
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Mission brief
The flight at a glance.
Classified payload for the US Space Force.
Open the full mission →Published flight sequence
Know what comes next.
Planned timings relative to the target. These steps do not indicate live progress.
- T−00:00:02
Ignition
- T+00:00:35
Supersonic
- T+00:00:47
Max-Q
- T+00:01:00
Liftoff
- T+00:01:45
Boosters Separation
- T+00:03:13
Fairing Separation