HTV-X1

HTV-X1
Mission typeISS resupply
OperatorJAXA
Spacecraft properties
SpacecraftHTV-X1
Spacecraft typeHTV-X
ManufacturerMitsubishi Heavy Industries
Start of mission
Launch dateOctober 2025[1] (planned)
RocketH3-24W,[2] Flight 7
Launch siteTanegashima, LA-Y2
ContractorMitsubishi Heavy Industries
Orbital parameters
Reference systemGeocentric orbit
RegimeLow Earth orbit
Berthing at ISS

HTV-X1 is the first flight and the technical demonstration mission of HTV-X, an uncrewed expendable cargo spacecraft. As of 2024, it is intended to be launched in 2025 to resupply the International Space Station (ISS).[3]

Cargo

In the pressurised compartment, HTV-X1 carries the following cargo:[4]

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

As unpressurised cargo, HTV-X1 carries following cargo:

  • i-SEEP, an exposed experiment platform

In addition to the primary mission of carrying the resupply cargo to the ISS, HTV-X1 carries the following payloads:[2]

  • DELIGHT, a technology demonstration of lightweight expandable flat antenna
  • Mt.FUJI, a technology demonstration for satellite laser ranging
  • H-SSOD, to deploy a CubeSat (Ten-Koh 2) after departure from ISS

References

  1. ^ "HTV-X1". Next Spaceflight. Retrieved 2024-10-26.
  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 (PDF) (in Japanese). Ministry of Education, Culture, Sports, Science. 9 February 2021. Retrieved 4 March 2021.
  3. ^ "宇宙基本計画⼯程表 (令和５年度改訂)" [Basic Plan on Space Policy (2023 Revision)] (PDF) (in Japanese). Cabinet Office. 22 December 2023. p. 45. Archived (PDF) from the original on 25 December 2023. Retrieved 26 December 2023.
  4. ^ 新型宇宙ステーション補給機（HTV-X）1号機の開発状況 (PDF) (in Japanese). JAXA. 2 June 2025. Retrieved 2 June 2025.


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