Solo flight about 100 hours, stand-by more than a week, docked with the ISS about 30 days.
The HTV is about 9.8 metres (32 ft) long (including maneuvering thrusters at one end) and 4.4 metres (14 ft) in diameter. Total mass when empty is 10.5 tonnes (11.6 short tons), with a maximum total payload of 6,000 kilograms (13,000 lb; 6.0 t; 6.6 short tons), for a maximum launch weight of 16.5 tonnes (18.2 short tons). The HTV is comparable in function to the Russian Progress, European ATV, commercial Dragon, and commercial Cygnus spacecraft, all of which bring supplies to the ISS. Like the ATV, the HTV carries more than twice the payload of the Progress, but is launched less than half as often. Unlike Progress capsules and ATVs, which use the docking ports automatically, HTVs and American commercial spacecraft approach the ISS in stages, and once they reach their closest parking orbit to the ISS, crew grapple them using the robotic arm Canadarm2 and berth them to an open berthing port on the Harmony module.
Like the European Automated Transfer Vehicle the Japan Aerospace Exploration Agency had agreed to take part in the resupply operations of the international space station and developed the HTV to perform this task.
Ku- and Ka-band geostationary communication satellite for China Satcom at 92.2° East, replacing ChinaSat 9.
Unidentified payload for the Russian military.
A batch of 28 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
A batch of 26 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Zhangheng 1-02, also known as CSES-02 (China Seismo-Electromagnetic Satellite-02), is the follow-on mission to Zhangheng 1/CSES, a Chinese–Italian sp…
A batch of 23 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
A batch of 26 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Synthetic aperture radar Earth observation satellite for Japanese Earth imaging company iQPS.
A batch of 23 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
A batch of 26 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.