Japan's Hayabusa2 achieves first-ever laser ranging experiment with an asteroid

Japan's Hayabusa2 spacecraft achieved a first in space exploration by conducting a successful laser-ranging experiment with asteroid Torifune. The experiment used Hayabusa2's LIDAR laser altimeter (LALT) to measure distances and gather data on asteroid density, porosity, and surface reflectance. The laser was fired twice, at 6:29 p.m. and 57.5 seconds before the flyby, from distances of about 20 km and 15 km, respectively. This required precise attitude and trajectory control, and the mission team successfully navigated the challenges of targeting a small, distant object.

The successful test highlights the importance of laser ranging in space exploration and planetary defense. It allows scientists to accurately determine the position and trajectory of celestial bodies, improving orbital predictions. The experiment also demonstrates how spacecraft can gather critical information about asteroids while traveling at high speeds. The team is now analyzing the exact location where the laser struck the asteroid's surface.

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