H-IIB 304
H-II familyMitsubishi Heavy IndustriesRetired
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
Specifications from Launch Library. Figures the operator has not published are omitted.
Flight record
9flightswith a definitive outcome
100%success rate9 of 9
0failuresincluding partial failures
9success streakcurrent
First flight September 10, 2009 · latest May 20, 2020
Counted from padside's own launch record, the same basis as the stats page.
Flights per year
- Successful
- Failed
Show the numbers for H-IIB flights per year
| Year | Successful | Failed | Total |
|---|---|---|---|
| 2009 | 1 | 0 | 1 |
| 2010 | 0 | 0 | 0 |
| 2011 | 1 | 0 | 1 |
| 2012 | 1 | 0 | 1 |
| 2013 | 1 | 0 | 1 |
| 2014 | 0 | 0 | 0 |
| 2015 | 1 | 0 | 1 |
| 2016 | 1 | 0 | 1 |
| 2017 | 0 | 0 | 0 |
| 2018 | 1 | 0 | 1 |
| 2019 | 1 | 0 | 1 |
| 2020 | 1 | 0 | 1 |