H-II Launch Vehicle
H-II was Japan's first large launch vehicle developed with domestically produced liquid-propellant stages. The two-stage hydrogen-oxygen rocket used an LE-7 first-stage engine, an LE-5A upper-stage engine, and two solid rocket boosters. Seven orbital vehicles flew from 1994 through 1999; the planned No. 7 was cancelled after the No. 5 orbital-injection shortfall and No. 8 launch failure.
Identity
- Aliases
- H-II original configurationH-2H-II rocket
- Family Name
- H-II
- Full Name
- H-II Launch Vehicle
- Reusability
- expendable
- Slug
- h-ii-launch-vehicle
- Status
- retired
- Type
- rocket
Details
- Description
- H-II was Japan's first large launch vehicle developed with domestically produced liquid-propellant stages. The two-stage hydrogen-oxygen rocket used an LE-7 first-stage engine, an LE-5A upper-stage engine, and two solid rocket boosters. Seven orbital vehicles flew from 1994 through 1999; the planned No. 7 was cancelled after the No. 5 orbital-injection shortfall and No. 8 launch failure.
- Diameter M
- 4
- Engines
- Count
- 1
- Name
- LE-7
- Placement
- core
- Count
- 2
- Name
- H-II SRB
- Placement
- booster
- Count
- 1
- Name
- LE-5A
- Placement
- upper
- First Flight Year
- 1,994
- Height M
- 50
- Last Flight Year
- 1,999
- Liftoff Mass Kg
- 260,000
- Manufacturer Id
- jd78f0qx6y0pykq0j05qvmz7qn7kpnbp
- Operator Id
- vh76by4pqcqgwz2c255w6r83m17nh9vh
- Parent Vehicle Family Id
- nd7jrtazwq037g6pf5wxg5prv18afrzt
- Stages Count
- 2
- Strap On Boosters Count
- 2
Links
- Official Url
- https://global.jaxa.jp/projects/rockets/h2/
- Wikipedia Url
- https://en.wikipedia.org/wiki/H-II
Assets & Meta
- Creation Time
- 7/14/2026, 8:00:43 AM
- Updated Time
- 7/14/2026, 8:00:43 AM