Lockheed Martin Astronautics

Atlas V (501) Atlas V (521) Atlas V (531) Atlas V (541) Atlas V (551)

Overall
Vehicle

Operational from 23.04.2010 17.07.2003 14.08.2010 26.11.2011 19.01.2006

 

to 20.05.2015 17.12.2004 18.09.2013 19.11.2016 24.06.2016
Orbital flights   6 2 3 4 7
Payload weight t GTO 3.78 GTO 6.48 GTO 7.45 GTO 8.29 GTO 8.90
Gross liftoff weight t 339.40 434.95 446.55 530.35 574.00
Gross propellant weight t 304.92 390.18 432.81 433.32 518.12
Total length m 62.45 59.70 59.70 59.70 59.70
Max. diameter (span) m          
Total liftoff thrust (s.l.) kN 3,826.9        
Total impulse (vac) MN*s 1,034.0 1,267.5 1,384.3 1,501.0 1,617.8

Fairing

Total length m 20.70/23.45 20.70/23.45 20.70/23.45 20.70/23.45 20.70/23.45
Diameter m 5.40 5.40 5.40 5.40 5.40
Total weight t 4.085/4.649 4.085/4.649 4.085/4.649 4.085/4.649 4.085/4.649
Stage 2

Name

  Cent. D-5 SEC Cent. D-5 SEC Cent. D-5 SEC Cent. D-5 SEC Cent. D-5 SEC
  Length (+interstage) m 6.54 (12.68) 6.54 (12.68) 6.54 (12.68) 6.54 (12.68) 6.54 (12.68)
Diameter m 3.83 - 5.40 (3.05) 3.83 - 5.40 (3.05) 3.83 - 5.40 (3.05) 3.83 - 5.40 (3.05) 3.83 - 5.40 (3.05)
Liftoff weight t 23.352 (+2.212) 23.352 (+2.212) 23.352 (+2.212) 23.352 (+2.212) 23.352 (+2.212)
Propellant weight t 20.830 20.830 20.830 20.830 20.830
Engines (Chambers)   RL-10A-4-2 (1) RL-10A-4-2 (1) RL-10A-4-2 (1) RL-10A-4-2 (1) RL-10A-4-2 (1)
Propellant   LH2/LOX LH2/LOX LH2/LOX LH2/LOX LH2/LOX
Total thrust (vac) kN 97.8 97.8 97.8 97.8 97.8
Specific impulse (vac) N*s/kg 4378 4378 4378 4378 4378
Burn time s 932 932 932 932 932
Total impulse (vac) MN*s 91.2 91.2 91.2 91.2 91.2

Stage 1

Name   CCB CCB CCB CCB CCB
  Length m 32.46 32.46 32.46 32.46 32.46
Diameter m 3.81 3.81 3.81 3.81 3.81
Liftoff weight t 305.440 305.440 305.440 305.440 305.440
Propellant weight t 284.089 284.089 284.089 284.089 284.089
Engines (Chambers)   RD-180 (2) RD-180 (2) RD-180 (2) RD-180 (2) RD-180 (2)
Propellant   Kerosene/LOX Kerosene/LOX Kerosene/LOX Kerosene/LOX Kerosene/LOX
Total thrust (s.l.) kN 3,826.9 3,826.9 3,826.9 3,826.9 3,826.9
Specific impulse (s.l.) N*s/kg 3058 3058 3058 3058 3058
Burn time s 227 (100%) 227 (100%) 227 (100%) 227 (100%) 227 (100%)
Total impulse (vac) MN*s 942.8 942.8 942.8 942.8 942.8

Booster

Name     2 SRB 3 SRB 4 SRB 5 SRB
  Length m   20.42 (17.70) 20.42 (17.70) 20.42 (17.70) 20.42 (17.70)
Diameter m 1.55 1.55 1.55 1.55
Liftoff weight t 93.39 104.09 186.79 233.48
Propellant weight t 85.26 127.89 170.52 213.15
Engines (Chambers)   Aerojet AJ-60A Aerojet AJ-60A Aerojet AJ-60A Aerojet AJ-60A
Propellant   solid HTPB solid HTPB solid HTPB solid HTPB
Total thrust (s.l.) kN 2,220.0 (av.) 3,330.0 (av.) 4,440.0 (av.) 5,550.0 (av.)
Specific impulse (s.l.) N*s/kg 2447 2447 2447 2447
Burn time s 93.8 93.8 93.8 93.8
Total impulse (vac) MN*s 233.5 350.3 467.0 583.8