HTV-X1

  1. Home
  2. Wiki

HTV-X1
Mission typeISS resupply
OperatorJAXA
Mission duration~30 days (planned)[1]
Spacecraft properties
Spacecraft typeHTV-X
ManufacturerMitsubishi Heavy Industries
Launch mass16,000 kg (35,000 lb)[2]
Dimensions8.0 × 4.4 m (26.2 × 14.4 ft)
Start of mission
Launch dateNET 21 October 2025, 01:58 UTC (10:58 JST)[3]
RocketH3-24W, Flight 7[4]
Launch siteTanegashima, LA-Y2
ContractorMitsubishi Heavy Industries
Orbital parameters
Reference systemGeocentric orbit
RegimeLow Earth orbit
Inclination51.6°
Berthing at ISS
Berthing portHarmony nadir
Cargo
Mass5,819 kg (12,829 lb)[1]
Pressurised4,069 kg (8,971 lb)[1]
Unpressurised1,750 kg (3,860 lb)[1]
HTV-X2 →

HTV-X1 is the first flight of the HTV-X series, serving as a technical demonstration mission of the new uncrewed expendable cargo spacecraft. It is scheduled to launch on 21 October 2025.[5][6]

Cargo

[edit]

Pressurised cargo

[edit]

HTV-X1 will deliver the following pressurised cargo to the International Space Station (ISS):[7]

  • Crew supplies
  • DRCS (Demonstration of Removing Carbon Dioxide System)
  • NORS (Nitrogen/Oxygen Recharge System) tank
  • RST (Water Resupply Tank)

Unpressurised cargo

[edit]
  • i-SEEP (IVA-replaceable Small Exposed Experiment Platform)

Additional payloads

[edit]

In addition to its primary cargo mission, HTV-X1 carries several technology demonstration payloads:[2]

  • DELIGHT, a demonstration of a lightweight expandable flat antenna
  • Mt.FUJI, a technology demonstration for satellite laser ranging
  • H-SSOD, a small satellite deployer that will release the CubeSat Ten-Koh 2 following departure from the ISS

References

[edit]
  1. ^ a b c d G. D. Krebs. "HTV-X1, 2, 3 (Kotonotori 1, 2, 3)". Gunter's Space Page. Retrieved 25 August 2025.
  2. ^ a b 新型宇宙ステーション補給機（HTV‐X）の開発状況について [Development status of the new space station resupply vehicle (HTV-X)] (PDF) (in Japanese). MEXT. 9 February 2021. Retrieved 4 March 2021.
  3. ^ "HTV-X1". Next Spaceflight. Retrieved 26 October 2024.
  4. ^ ２０２５年度ロケット打上げ計画書 新型宇宙ステーション補給機１号機（HTV-X1）／H3 ロケット 7 号機（Ｈ３・Ｆ７) (PDF) (in Japanese). JAXA. August 2025. Retrieved 9 September 2025.
  5. ^ "Launch Schedule of New unmanned cargo transfer spacecraft（HTV-X1）aboard the 7th H3 Launch Vehicle (H3 F7)". JAXA. 22 August 2025. Retrieved 23 August 2025.
  6. ^ "Japan to launch new ISS resupply vehicle in October". The Japan Times. 23 August 2025. Retrieved 25 August 2025.
  7. ^ 新型宇宙ステーション補給機（HTV-X）1号機の開発状況 [Development status of the first HTV-X (HTV-X) space station resupply vehicle] (PDF) (in Japanese). JAXA. 2 June 2025. Retrieved 3 June 2025.
Stub icon

This article about one or more spacecraft of Japan is a stub. You can help Wikipedia by expanding it.