Kounotori 6 (HTV-6)
H-IIB 304
Mitsubishi Heavy Industries
Mission
Kounotori 6 (HTV-6)
Type: Resupply
This is the sixth flight of an uncrewed cargo spacecraft to International Space Station. It will bring the replacement for the batteries used on the Station to store electricity generated by solar panels, as well as 600 liters of potable water.
Trajectory
The trajectory is unavailable. Check back for updates.

Rocket
H-IIB 304 – Mitsubishi Heavy Industries
- Family: H2B
- Length: 56.6 m
- Diameter: 5.2 m
- Launch Mass: 551 T
- Low Earth Orbit Capacity: 16500 kg
The H-IIB 304 was manufactured by Mitsubishi Heavy Industries with the first launch on 2009-09-10. H-IIB 304 has 9 successful launches and 0 failed launches with a total of 9 launches. H-IIB (H2B) is an expendable launch system used to launch H-II Transfer Vehicles (HTV, or Kounotori) towards the International Space Station. H-IIB rockets are liquid-fuelled with solid-fuel strap-on boosters and are launched from the Tanegashima Space Center in Japan. Mitsubishi and JAXA have been primarily responsible for design, manufacture, and operation of H-IIB.
Agency
Mitsubishi Heavy Industries – MHI
- Type: Commercial
- Abbreviation: MHI
- Administration: President: Seiji Izumisawa
- Founded: 1884
- Launchers: H-I, H-II, H-III
- Spacecraft: Kounotori | HTV
- Country: JPN
Mitsubishi Heavy Industries, Ltd. is a Japanese multinational engineering, electrical equipment and electronics company headquartered in Tokyo, Japan. MHI is one of the core companies of the Mitsubishi Group.
MHI’s products include aerospace components, air conditioners, aircraft, automotive components, forklift trucks, hydraulic equipment, machine tools, missiles, power generation equipment, printing machines, ships and space launch vehicles. Through its defense-related activities, it is the world’s 23rd-largest defense contractor measured by 2011 defense revenues and the largest based in Japan.