Science
HMU-SAT2
Japanese Educational CubeSat (ISS-Deployed, High-School Built) · Hokkaido University of Science / Komagane Technical High School (Japan)
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HMU-SAT2, nicknamed 'Teruteru' after the Japanese good-weather charm doll, deployed from the ISS on February 3, 2026. Built jointly by Hokkaido University of Science and Nagano Prefecture's Komagane Technical High School — making it, remarkably, a satellite co-designed by working high schoolers — HMU-SAT2 carries LED lights that flash Morse code messages down to Earth, a technology demonstration built explicitly for educational outreach. It's one of the plainest reminders in orbit that spaceflight has become accessible enough for teenagers to help build something that actually flies.
Its orbit
- Orbit
- Low Earth Orbitcan appear as a fast-moving star at dawn or dusk
- Altitude
- 207–214 mi (333–344 km)
- Inclination
- 51.6°
- One orbit
- 91.2 minutes15.8 orbits a day
- NORAD ID
- 67688
- Int’l designator
- 1998-067YE
- Launched
- 1998
Orbital elements from CelesTrak, as of 21 Sep 2026.
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