H-IIB

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The H-IIB is a family of liquid-fuelled rockets providing an expendable launch system for the main purpose of launching the H-II Transfer Vehicle towards the International Space Station. It is manufactured by Mitsubishi for the Japan Aerospace Exploration Agency, or JAXA. Launches will occur at the Tanegashima Space Center.

The H-IIB, will be launched for the first time in 2008 and will be able to carry a payload of up to 8 tons to GTO, compared with the payload of 4 to 6 tons for the H-IIA. Its performance in LEO will be sufficient for the HTV (16,500 kg).

The H-IIB is a derivative of the earlier H-IIA rocket. The H-IIB will have two engines, instead of the H-IIA's one, and four main booster rockets, instead of the H-IIA's two.

The development of this new launcher has required since 2004 a budget of around 20 billion yen (US$180 million; €150 million).

After the H-IIB, JAXA intends to develop the human-rated H-IIC - sometimes also called H-IIX - in order to reach its objective of a capability to launch humans by 2025.

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List of expendable launch vehicles
Current:

Ariane 5 • Atlas V • Cosmos-3M • Delta II • Delta IV • Dnipro • Geosynchronous Satellite Launch Vehicle • H-IIA • Long March • Minotaur • Pegasus • Polar Satellite Launch Vehicle • Proton • Rockot • Soyuz • Taurus • Tsyklon • Zenit
Planned:

Angara • GX • H-IIB • Vega • GSLV III
Historical:

Ariane 1 • Ariane 2/3 • Ariane 4 • Atlas ICBM • Atlas II • Atlas III • Black Arrow • Delta III • Diamant • Energia • Europa • M-V • N1 • R-7 Semyorka • Saturn I • Saturn IB • Saturn V • Saturn INT-21 • PGM-17 Thor • Titan (I, II, III, IV) • Voskhod • Vostok
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