Japan’s innovative HTV-X cargo spacecraft is scheduled to commence its inaugural mission to the International Space Station today, October 25th. The public can tune in to witness the historic liftoff live.
The robotic HTV-X spacecraft is poised for liftoff today from Japan’s Tanegashima Space Center, riding atop an H3 rocket. The launch is anticipated around 8 p.m. EDT, which will mark 0000 GMT and 9 a.m. local Japan time on October 26.
Space enthusiasts can follow the upcoming launch live directly on Space.com, via a broadcast provided by the Japan Aerospace Exploration Agency (JAXA). Alternatively, viewers can access JAXA’s own dedicated live feed. Pre-launch coverage is slated to begin approximately one hour before liftoff.
The HTV-X marks the next generation of space cargo vehicles from JAXA, Japan’s aerospace exploration agency. It succeeds the well-regarded H-II Transfer Vehicle (HTV), more widely known by its Japanese moniker, Kounotori, or “White Stork.” This predecessor spacecraft proved instrumental in resupplying the International Space Station (ISS), completing a total of nine missions to the orbital outpost between September 2009 and May 2020.
The new HTV-X freighter, measuring 26.2 feet (8 meters) in length, is notably more compact than its predecessor, standing 4 feet (1.2 meters) shorter. Despite its reduced dimensions, the advanced spacecraft is engineered to transport roughly the same substantial payload mass—approximately 13,200 pounds (6,000 kilograms)—to low Earth orbit. This impressive efficiency, alongside other advanced capabilities, marks the HTV-X as a significant evolution in cargo delivery.
Mitsubishi Heavy Industries, which is developing the HTV-X for the Japan Aerospace Exploration Agency (JAXA), states that the new spacecraft will significantly enhance space transportation capabilities. Beyond its primary role, the HTV-X is designed to introduce a crucial new feature: offering diverse users opportunities for on-orbit demonstrations. These in-space testing periods can extend for up to 1.5 years, commencing after the vehicle’s departure from the International Space Station and continuing until its re-entry into Earth’s atmosphere.
The Japanese Aerospace Exploration Agency (JAXA) sees the HTV-X as having significant applications extending well beyond its current role with the International Space Station. The agency envisions the next-generation cargo vehicle supporting future human space activities in low Earth orbit after the ISS era. Moreover, JAXA suggests the HTV-X could potentially deliver crucial cargo to Gateway, the lunar-orbiting space station NASA plans to establish as a key component of its Artemis program.
The International Space Station’s cargo transport capabilities are set for a substantial boost with the upcoming debut of the HTV-X, which will expand the active resupply fleet by one-third. Currently, the orbiting laboratory receives its provisions from three operational freighters: Russia’s Progress vehicle, Northrop Grumman’s Cygnus, and SpaceX’s Dragon. A key distinction among these spacecraft is their reusability; only SpaceX’s Dragon is designed to return to Earth for subsequent missions. The Progress, Cygnus, and the new HTV-X are all single-use vehicles, engineered to de-orbit and safely disintegrate in Earth’s atmosphere upon the completion of their missions.
