JAXA's Hayabusa2 Executes Close Flyby of Asteroid Torifune

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Key takeaways

Japan's space probe Hayabusa2 completed a close flyby within 800 meters of the near-Earth asteroid Torifune.
Torifune is an elongated, primitive asteroid with an average diameter of 450 meters that rotates completely every five hours.
Developed by JAXA, Hayabusa2 previously returned soil samples from asteroid Ryugu in 2020 before starting its extended mission phase.
The probe relies on an electric ion thruster engine and autonomous optical navigation software to execute precise targeting without real-time manual ground commands.

Japan's space agency announced that its robotic probe, Hayabusa2, recently completed a close flyby within 800 meters of the asteroid Torifune.

Torifune is a primitive near-Earth asteroid under one kilometer in size that travels around the Sun near Earth's orbital path, making it ideal for space research and asteroid defense tests.
Scientists classify this asteroid as a potentially hazardous near-Earth object because of its specific deep-space orbital path.

Estimates show that Torifune has an average diameter of roughly 450 meters.
Radar data and early photos reveal that the asteroid has an elongated, irregular shape instead of a round spherical form.
The asteroid spins quickly on its axis, completing one full rotation every five hours, which changes how it looks to passing spacecraft cameras.

Engineers originally built Hayabusa2 to collect space samples, and after it successfully brought soil from asteroid Ryugu in 2020, it began an extended mission phase called Hayabusa2# to perform complex solar system flybys.
The Japan Aerospace Exploration Agency (JAXA) developed and operates this deep-space exploration mission.

The extended mission tests if a spacecraft designed for slow orbital alignment can navigate with enough precision to target a fast-moving space object.
It aims to perfect close-range navigation systems so future spacecraft can act as kinetic impactors to strike and deflect dangerous asteroids away from Earth.

Scientists designed the probe as a compact, refrigerator-sized cube structured for long journeys across deep space.
Since the spacecraft lacks movable camera lenses, operators must rotate the entire body of the probe to keep the asteroid within its field of view.
The spacecraft uses an electric ion thruster engine to make tiny, highly precise path adjustments during its years of travel.
The probe carries advanced optical navigation software that automatically tracks the target asteroid during its closest approach without waiting for commands from Earth.