Hayabusa2 threads a close pass by asteroid Torifune
New CapabilitiesJapan's probe tests pinpoint asteroid navigation on its long road to a tiny space rock in 2031
July 5th, 2026: Hayabusa2 flies past TorifuneNew here? Follow stories to track developments over time. Create a free account to get updates when stories you care about change.
Overview
Updated Jul 5On July 5, 2026, a Japanese spacecraft flew about 1 kilometer past an asteroid the size of a skyscraper, moving at roughly 5 kilometers per second. JAXA confirmed Hayabusa2 pulled off the pass and gathered data on 98943 Torifune, a 450-meter rock no probe had ever visited.
The flyby was a navigation test as much as a science run. Steering that precisely at that speed is the same skill needed to slam a spacecraft into an asteroid on purpose. That is the core move in planetary defense, and Hayabusa2 just rehearsed it.
Why it matters
The same pinpoint steering Hayabusa2 tested is what a future mission would need to nudge a dangerous asteroid off a collision course with Earth.
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Timeline
December 2014 July 2026
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Hayabusa2 flies past Torifune
Latest MilestoneThe probe passes roughly 1 kilometer from the 450-meter asteroid at about 5 km/s, gathering data and testing close-range autonomous guidance.
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Plan briefed to asteroid scientists
StatementJAXA's Satoshi Tanaka details the flyby at a NASA Small Bodies Assessment Group meeting.
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JAXA sets the flyby date
StatementJAXA announces the July 5 Torifune flyby and the plan to pass as close as 1 kilometer.
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Ryugu samples come home
MilestoneA capsule with Ryugu material lands in Australia. JAXA extends the mission and points the probe at new targets.
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Hayabusa2 launches
MilestoneJAXA sends Hayabusa2 from Tanegashima toward the near-Earth asteroid Ryugu.
Historical Context
3 moments from history that rhyme with this story — and how they unfolded.
Deep Impact hits comet Tempel 1 (2005)
NASA's Deep Impact released a washing-machine-sized copper slug that smashed into comet Tempel 1 while the main craft watched. The goal was to study what lay beneath a comet's surface. The impactor had to steer itself into a target moving at more than 10 km/s.
The collision blasted out a bright plume, revealing the comet's dusty, loosely packed makeup.
It showed spacecraft can autonomously guide themselves into small, fast bodies, a building block for later impact missions.
Like Hayabusa2's flyby, it hinged on hitting a precise point near a small body at high closing speed.
Original Hayabusa returns Itokawa dust (2010)
Japan's first Hayabusa probe reached the asteroid Itokawa, survived thruster and communication failures, and limped home with the first samples ever taken from an asteroid. The mission nearly failed several times over seven years.
A capsule with tiny Itokawa grains landed in Australia, a world first despite the spacecraft's damage.
It established Japan's asteroid program and the playbook of pushing aging probes through risky extended operations.
The current extended mission repeats that bet: squeeze more firsts out of tired hardware rather than retire it.
NASA's DART impact (2022)
NASA flew a 570-kilogram spacecraft, DART, straight into the small asteroid Dimorphos at about 6 km/s. It was the first test of deflecting an asteroid by hitting it. The craft steered itself into the target using onboard cameras in the final hour.
The impact shortened Dimorphos's orbit around its larger companion by about 32 minutes, more than expected.
DART proved a kinetic impactor can measurably move an asteroid, making it the leading planetary-defense method on the table.
Hayabusa2's close, high-speed pass tests the same precise autonomous guidance a DART-style deflection needs.
