Nancy Grace Roman Space Telescope

Countdown10

Ascent8

1. T+0:0011:26 AMFirst upwards movement of the rocket
2. T+1:0811:27 AMMaximum dynamic pressure
3. T+2:2411:28 AMCut-off of the side boosters
4. T+2:2711:28 AMSeparation of the side boosters
5. T+3:5111:29 AMCut-off of the main engine
6. T+3:5411:29 AMSeparation of the second stage from the first
7. T+4:0011:30 AMFirst start of the second engine
8. T+4:1511:30 AMSeparation of the payload fairing

Booster Return7

1. T+2:3211:28 AMFlip maneuver of the side boosters
2. T+2:4311:28 AMStart of the boosters boostback burn
3. T+3:4811:29 AMEnd of the boosters boostback burn
4. T+6:1911:32 AMStart of the boosters atmospheric entry burn
5. T+6:2911:32 AMEnd of the boosters atmospheric entry burn
6. T+7:2311:33 AMStart of the boosters landing burn
7. T+7:4011:33 AMLanding of the boosters

Second Stage and Payload4

1. T+8:2811:34 AMFirst cut-off of the second engine
2. T+24:3311:50 AMSecond start of the second engine
3. T+26:3211:52 AMSecond cut-off of the second engine
4. T+31:3111:57 AMFinal deployment of the payload from the rocket