Kounotori 9
Iss020e0413802 - cropped.jpg
H-II Transfer Vehicle (HTV-1) approaching the ISS
Mission typeISS resupply
Spacecraft properties
SpacecraftKounotori 9
Spacecraft typeHTV
Payload mass6,200 kg (13,700 lb)
Dimensions9.8 m (32 ft) long
4.4 m (14 ft) diameter
Start of mission
Launch date20 May 2020, 17:30 UTC [1]
Launch siteTanegashima, LA-Y
Orbital parameters
Reference systemGeocentric
RegimeLow Earth
Berthing at ISS
Berthing portHarmony or Unity

Kounotori 9 (こうのとり9号機), also known as HTV-9 will be the 9th flight of the H-II Transfer Vehicle, a robotic cargo spacecraft to resupply the International Space Station.[2][3] As of April 2020, it is scheduled to be launched on 20 May 2020, at 17:30 UTC.[1]

As currently manifested, Kounotori 9 will be the last HTV of the original model, with following missions replaced with the HTV-X.[2][4]


Major difference from the previous Kounotori are:[5]

  • Camera assembly unit and Wireless LAN communication unit to demonstrate communication in the proximity of ISS for the real-time video monitoring of approach. It is a technology demonstration for use with HTV-X and Gateway.


Kounotori 9 will carry about 6.2 t of cargo, consisting of 4.3 t in the pressurized compartment and 1.9 t in the unpressurized compartment.[5]

Cargo in the pressurized compartment (Pressurized Logistics Carrier, PLC) is, in addition to the foods and crew commodities:[5]

  • JAXA cargo:
    • Solid Combustion Experiment Module (SCEM)
    • Integrated Standard Imager for Microsatellites (iSIM), a commercial technology demonstration payload by Spanish company Satlantis
    • Equipment for the space media business collaboration (Space Frontier Studio KIBO)
  • NASA cargo:
    • EXPRESS Rack 11B (ER11B)
    • Tank for Water Storage System (WSS)
    • High-pressure nitrogen tank for Nitrogen Oxygen Recharge System (NORS)

Cargo in the unpressurized compartment (Unpressurized Logistics Carrier, ULC) are the six lithium-ion batteries Orbital Replacement Units (ORUs) for replacing the ISS's existing nickel-hydrogen batteries. This is the last of the series of transportation of replacement batteries, following the previous Kounotori 6, Kounotori 7, and Kounotori 8.



  1. ^ a b 宇宙ステーション補給機「こうのとり」9号機(HTV9)の打上げについて (in Japanese). JAXA. 24 March 2020. Retrieved 28 March 2020.
  2. ^ a b Krebs, Gunter Dirk (2016-07-11). "HTV 1, ..., 9 (Kounotori 1, ..., 9)". Gunter's Space Page. Retrieved 2016-07-19.
  3. ^ "HTV-Kounotori sets sail for the ISS". NASASpaceFlight.com. August 18, 2015. Retrieved December 19, 2015.
  4. ^ Krebs, Gunter Dirk (2016-07-11). "HTV-X 1, 2, 3". Gunter's Space Page. Retrieved 2016-07-19.
  5. ^ a b c 宇宙ステーション補給機「こうのとり」9号機(HTV9)ミッションプレスキット] (PDF) (in Japanese). JAXA. 25 March 2020. Retrieved 28 March 2020.

External links

  • HTV9 mission (JAXA)
  • The Space Frontier Studio - KIBO