H-II Transfer Vehicle (HTV-1) approaching the ISS
|Mission type||ISS resupply|
|Launch mass||16,500 kg (36,400 lb)|
|Payload mass||6,000 kg (13,000 lb)|
|Dimensions||9.8 m (32 ft) long x 4.4 m (14 ft) diameter|
|Start of mission|
|Launch date||Planned: September 2019|
|Launch site||LA-Y, Tanegashima|
|Berthing at ISS|
|Berthing port||Harmony nadir or Unity nadir|
Kounotori 8 (こうのとり8号機), also known as HTV-8 will be the 8th flight of the H-II Transfer Vehicle, an unmanned cargo spacecraft to resupply the International Space Station. As of June 2019[update], it is planned to be launched in September 2019.
Major changes from previous Kounotori are:
- Replacement of Earth Sensor with Star Tracker for spacecraft attitude control
- New cargo racks developed for HTV-X which allows 30% more Cargo Transfer Bags (CTB) to be carried in the Pressurized Logistics Carrier (PLC). (316 CTBs for Kounotori 8, compared to 248 CTBs of Kounotori 6)
Cargo in the Pressurized Logistics Carrier (PLC) include:
- JAXA experiment Cell Biology Experiment Facility - Left (CBEF-L)
- JAXA experiment Sony Optical Link for ISS (SOLISS), a satellite optical communication demonstration co-developed with Sony Computer Science Laboratories
- JAXA experiment Hourglass, an experiment to test behavior of pulverulent material under the low-garvity condition
- Gas bottle for JAXA experiment
- Experiment materials for Electrostatic Levitation Furnace (ELF)
- CubeSats to be deployed from ISS: NARSSCube-1, AQT-D, RWASAT-1
- NASA system supply cargo: New water tank for Water Storage System (WSS)
- NASA system supply cargo: tank for Nitrogen Oxygen Recharge System (NORS)
In the Unpressurized Logistics Carrier (ULC), Kounotori 8 carries six lithium-ion batteries Orbital Replacement Units (ORUs) for replacing the ISS's existing nickel-hydrogen batteries. The transportation of replacement batteries is a continuation from the previous Kounotori 6 and 7, and will continue through to Kounotori 9.
- NASA Office of Inspector General (June 28, 2016). NASA's Response to SpaceX's June 2015 Launch Failure: Impacts on Commercial Resupply of the International Space Station (PDF) (Report). NASA Office of Inspector General. p. 13. Retrieved 2016-07-18.
- Krebs, Gunter Dirk (2016-07-11). "HTV". space.skyrocket.de. Retrieved 2016-07-18.
- "International Space Station Flight Schedule". spider.seds.org. 2019-01-16. Retrieved 2019-02-17.
- 宇宙ステーション補給機「こうのとり」8号機（HTV8）【ミッションプレスキット】 (PDF) (in Japanese). JAXA. 17 July 2019. Retrieved 22 July 2019.
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