Launch day set for KOUNOTORI6/H-IIB F6!
The launch date and time for the H-IIB Launch Vehicle No. 6 (H-IIB F6) with the H-II Transfer Vehicle "KOUNOTORI6" (HTV6) onboard was set for around 2:16 a.m. on October 1 (Sat.), 2016 (Japan Standard Time). * Launch time will be determined by the updated orbit of the ISS. We welcome your support messages to KOUNOTORI6 mission and its project team members! ...
- Jul. 26, 2016 (12:00) [release]
- Launch of the H-II Transfer Vehicle "KOUNOTORI6" (HTV6) aboard the H-IIB Launch Vehicle No. 6
- Sep. 30, 2015 (06:00) [release]
- Successful re-entry of H-II Transfer Vehicle “KOUNOTORI5” (HTV5)
About H-II Transfer Vehicle "KOUNOTORI" (HTV)
H-II Transfer Vehicle "KOUNOTORI" (HTV) Key Space Transfer Vehicle
The International Space Station (ISS) represents a global partnership of fifteen nations. The ISS is a versatile research institute and a large observation platform in the unique environment of outer space. In this international project, Japan participates with its first manned space facility, Japanese Experiment Module "KIBO". "KIBO" means "hope" in Japanese.
The KOUNOTORI is an unmanned cargo transporter to be launched by the H-IIB launch vehicle. It is designed to deliver up to six tons of supplies including food, clothes, and experiment devices to the ISS in orbit at an altitude of about 400 kilometers and return with spent equipment, used clothing, and other waste material.
The KOUNOTORI with waste material is incinerated when it makes a re-entry into the atmosphere. This transport operation involves a rendezvous with and docking to the ISS, in a situation requiring a highly reliable transfer vehicle.
The system was, therefore, being developed based on the rendezvous technical technology accumulated through work on the Engineering Test Satellite VII (ORIHIME/HIKOBOSHI), and with the application of fuselage design techniques accumulated during the development of the H-II and H-IIA launch vehicles, and manned space technology used for the Japanese Experiment Module "KIBO."
The development of the HTV is aimed at the practical use of a low-cost and highly reliable means of transport to the ISS. It is expected that the practical operation of KOUNOTORI will allow Japan to accumulate know-how that can serve as basic technology for its future projects on the Space Flyer Unit and on manned transportation.
Characteristics of H-II Transfer Vehicle "KOUNOTORI" (HTV)
KOUNOTORI is four meters across and about 10 meters long, a size large enough to accommodate a sightseeing bus.
It consists primarily of three parts:(1) A propulsion module installed at the rear and composed of main engines for orbit change, Reaction Control System (RCS) thrusters for position control, fuel and oxidizing reagent tanks, and high-pressure air tanks; (2) An avionics module installed in the center part, with electronic equipment for guidance control, power supply, and telecommunications data processing; and (3) A logistics carrier that stores supplies.
|Length||Approx. 9.8m (including thrusters)|
|Total Mass||Approx. 10,500kg|
(supplies and equipment)
-Pressurized cargo: Max. 5,200kg
-Unpressurized cargo: Max. 1,500kg
|Cargo capacity (waste)||Approx. 6,000kg|
|Target orbit to ISS||Altitude: 350km to 460km
Inclination: 51.6 degrees
|Maximum duration of a mission||Rendezvous flight period: about five days
Bearthed with the ISS: about 45 days
On-orbit emergency stand-by: about seven days