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H-II Transfer Vehicle
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H-II Transfer Vehicle HTV-4 spacecraft
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H-II Transfer Vehicle
H-II Transfer Vehicle H-II Transfer Vehicle approaching the International Space Station, September 2009.

H-II Transfer Vehicle

Japanese spacecraft
Also known as: HTV, Kounotori
Written by
Erik Gregersen
Erik Gregersen is a senior editor at Encyclopaedia Britannica, specializing in the physical sciences and technology. Before joining Britannica in 2007, he worked at the University of Chicago Press on the...
Erik Gregersen
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Britannica Editors
Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
Britannica Editors
History

H-II Transfer Vehicle (HTV), uncrewed Japanese spacecraft that carries supplies to the International Space Station (ISS). The first HTV was launched from the Tanegashima Space Centre on Tanegashima Island, Kagoshima prefecture, on September 11, 2009. The Japan Aerospace Exploration Agency launched nine HTVs periodically through 2020. An improved version of the craft, the HTV-X, is scheduled to have its first launch in 2022. The HTV is a cylinder 9.8 metres (32 feet) long and 4.4...

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