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. H-IIB is able to carry a payload of up to 8000 kg to GTO compared with the payload of 4000-6000 kg for the H-IIA.
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