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H-II Transfer Vehicle KOUNOTORI (HTV)

HTV9 Mission

HTV9 mission logo

Developed and built in Japan, the H-II Transfer Vehicle (HTV) known as "KOUNOTORI (meaning 'white stork' in Japanese)" is an unmanned cargo transfer spacecraft that delivers supplies to the International Space Station (ISS).
"KOUNOTORI" provides very basic support for ISS operations by delivering up to six tons of cargo and has the world's largest transportation capacity. It also has the unique function of carrying multiple numbers of large-size experimental instruments on one flight.


A World's First Successful Demonstrative Mission of On-orbit Wireless LAN Communication and Transmission of Monitored Docking Images! (July 3, 2020)

On May 25, 2020, videos taken by the camera installed on the H-II Transfer Vehicle "KOUNOTORI9" (HTV9) were successfully transferred to the ISS using wireless LAN (WLAN) in the vehicle's upward approaching phase for capture.

HTV9 Payload (June 2, 2020)

HTV9 payload web page.

» HTV9 Mission News

HTV9 Mission Schedule (as of May 26, 2020)

Item Schedule*1
HTV flight name HTV9 (KOUNOTORI9) (The ninth HTV flight: HTV9)
Date of Launch May 21, 2020
Time of Launch 2:31:00 a.m.
HTV9 capture 9:13 p.m., May 25, 2020
Berthing completion to the ISS 3:25 a.m., May 26, 2020
  • *1 All times are Japan Standard Time (JST. UTC + 9 hours)

Major payload to be delivered on board HTV9

Major payload to be delivered on board HTV9 is as follows.

Cargo in the Pressurized Logistics Carrier (PLC)

  • Utilization/experiment-related items
    • integrated Standard Imager for Microsatellites (iSIM)
    • Solid Combustion Experiment Module (SCEM) and related equipments for the "FLARE"
    • Broadcasting related equipments for "The Space Frontier Studio KIBO"
  • Cargo for the ISS crew
    • Fresh Food
    • Crew Provisioning Items

Cargo in the Unpressurized Logistics Carrier (ULC)

  • ISS Li-ion battery Orbital Replacement Units (ORUs)

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