| Mission type | ISS resupply |
|---|---|
| Operator | JAXA |
| Spacecraft properties | |
| Spacecraft | HTV-X |
| Berthing at ISS | |
| Berthing port | Harmony nadir |
HTV-X3 is the third flight of HTV-X, an uncrewed expendable cargo spacecraft to resupply International Space Station. It is planned to be launched in JFY2026.1
Payload
In its unpressurised cargo section, HTV-X3 will carry Multi-layer Acoustic & Conductive-grid Sensor (MACS), a technology demonstration of millimeter-sized orbital debris detection, co-developed by NASA and JAXA.2
References
References
- 宇宙基本計画工程表（令和６年度改訂） (PDF) (in Japanese). Cabinet Office, Japan. 24 December 2024. Retrieved 5 November 2025.
- Liou, Jer-Chyi (2024-10-28). NASA Orbital Debris Program Office and MACS HTV-X3 Technology Demonstration Mission. The 11th Space Debris Workshop. Chofu, Tokyo (hybrid). doi:10.20637/0002001381.