H-IIB
launch vehicle
Quick Summary
The H-IIB was a Japanese launch vehicle designed to carry the H-II Transfer Vehicle (HTV) to the International Space Station (ISS). It was a variant of the H-IIA launch vehicle, developed by the Japan Aerospace Exploration Agency. The HTV, a cylindrical uncrewed spacecraft, delivered supplies to the ISS. The first HTV was launched in 2009, with subsequent launches occurring periodically until 2020. An improved version, the HTV-X, was scheduled for its first launch in 2022.12
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