The H3 Launch Vehicle is an expendable launch system in development in Japan. Each H3 booster configuration has a two-digit and a letter designation that indicates the features of that configuration. The first digit represents the number of LE-9 engines on the main stage, either "2" or "3". The second digit indicates the number of SRB-3 solid rocket boosters attached to the base of the rocket, and can be "0", "2" or "4". All layouts of solid boosters are symmetrical. The letter in the end shows the length of the payload fairing, either short "S" or long "L". For example, an H3-24L has two engines, four solid rocket boosters, and a long fairing, whereas an H3-30S has three engines, no solid rocket boosters, and a short fairing.
Specifications
- Thrust
- 12,142 kN
- Height
- 63 m
- Diameter
- 5.27 m
- Launch mass
- —
- Stages
- 2
- Launch cost
- $50M
- LEO capacity
- —
- GTO capacity
- 7,900 kg
- GEO capacity
- —
- SSO capacity
- —
Vehicle specifications from Launch Library; blanks are unpublished figures.
Flight record
Counted from padside's own launch record — the same basis as the Stats page.
Launches
Next: H3-24 | Martian Moon eXplorer (MMX) — October 31, 2026
- H3-24 | HTV-X1 — Success