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H-II Transfer Vehicle KOUNOTORI (HTV)

HTV5 mission logo

HTV5 mission logo

HTV5 Mission

Developed and built in Japan, the H-II Transfer Vehicle (HTV) known as "KOUNOTORI (white stork)" is an unmanned cargo transfer spacecraft that delivers supplies to the International Space Station (ISS).

Japan, the U.S., and Russia currently operate cargo transfers to the ISS. Among the supply vehicles, KOUNOTORI serves as the backbone of ISS operations with its world-leading supply capacity of approx. 6 metric tons, and is the only space liner capable of delivering large items of hardware.

Given its consistent on-time arrivals ever since the launch of the first technology demonstration mission, KOUNOTORI is widely acknowledged to be a safe and reliable vehicle, for which the world has high expectations regarding its operations.

The launch of KOUNOTORI5 is scheduled for 20:50, August 17, 2015 (Japan time).

The features, payload, and schedule of the HTV5 mission are updated.

Features of the HTV5
HTV5 payload
HTV5 mission timeline


CALET installation completed

CALET installation completed (August 26, 2015)

At 11:29 p.m. (2:29 p.m. UTC), August 25, the CALET on the EP was transferred by the Kibo’s robotic arm (JEMRMS) and installed to the Kibo’s Exposed Facility (EF).

≫ HTV5 Mission News

Flight Schedule

HTV5 Mission Schedule (as of August 25, 2015)
All times are Japan Standard Time (UTC + 9 hours)
Item Description
Launch date August 19, 2015
Launch time 8:50 p.m.
Launch window Aug. 17 (Mon.) - Sept. 30 (Wed.), 2015
Launch site Yoshinobu Launch Complex, Tanegashima Space Center (TNSC)
HTV5 capture 7:29 p.m., August 24, 2015
Berthing completion to the ISS (Activation of the HTV DDCU) 2:28 a.m., August 25, 2015
Altitude Insertion Orbit: 200 km x 300 km (elliptical orbit)
Rendezvous: Approx. 400km
Inclination 51.7 degrees

All photo credits in the HTV webpages are JAXA unless otherwise noted.

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