H-IIB (H2B) is an expendable launch system used to launch H-II Transfer Vehicles (HTV, or Kounotori) towards the International Space Station. H-IIB rockets are liquid-fuelled with solid-fuel strap-on boosters and are launched from the Tanegashima Space Center in Japan. Mitsubishi and JAXA have been primarily responsible for design, manufacture, and operation of H-IIB.
Specifications
- Thrust
- 9,000 kN
- Height
- 56.6 m
- Diameter
- 5.2 m
- Launch mass
- 551 t
- Stages
- 2
- Launch cost
- $112.5M
- LEO capacity
- 16,500 kg
- GTO capacity
- 8,000 kg
- GEO capacity
- —
- SSO capacity
- —
Vehicle specifications from Launch Library; blanks are unpublished figures.
Flight record
Flights
9
Launches with a definitive outcome
Success rate
100%
9 of 9
Current success streak
9
Landings
0
0 attempts · 0 droneship / 0 RTLS
Fastest turnaround
—
Between consecutive booster flights
Counted from padside's own launch record — the same basis as the Stats page.
Launches
- H-IIB 304 | Kounotori 9 (HTV-9) — Success
- H-IIB 304 | Kounotori 8 (HTV-8) — Success
- H-IIB 304 | Kounotori 7 (HTV-7) — Success
- H-IIB 304 | Kounotori 6 (HTV-6) — Success
- H-IIB 304 | Kounotori 5 (HTV-5) — Success