H-IIB (2009-Active)
First Flight: September 10, 2009
Last Flight: (Active)
Stages: 2
Total Mass: 531 tons
Payload Mass: 19,000 kg to LEO; 8,000 kg to GTO
Diameter: 5.2 m
Length: 56.6 m
Booster Stage
Type: SRB-A3 Boosters
Arrangement: 4 boosters with 1 x solid each
Thrust (kN): 9,220
Propellant: Solid
ISP: 283.6 s
ISP (sea level):
Burn Time: 114 s
Gross Mass: ?
First Stage
Type: Core
Arrangement: 2 x LE-7A
Thrust (kN): 2,196
Propellant: LOX/LH2
ISP: 440 s
ISP (sea level):
Burn Time: 352 s
Gross Mass: ?
Second Stage
Type: Core
Arrangement: 1 x LE-5B
Thrust (kN): 137
Propellant: LOX/LH2
ISP: 448 s
ISP (sea level):
Burn Time: 499 s
Gross Mass: ?