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Japan probe on track to touch down on asteroid
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A JAPANESE spacecraft began its approach yesterday toward a distant asteroid on a mission to collect material that could provide clues to the origin of the solar system and life on Earth.
Hayabusa2’s descent was delayed for about five hours for a safety check, but the unmanned craft is still due to touch down as scheduled this morning, the Japan Aerospace Exploration Agency said.
During the touchdown, which will last just seconds, Hayabusa2 will extend a pipe and shoot a pinball-like bullet into the asteroid to blow up material from beneath the surface. If all goes successfully, the craft will then collect samples that would eventually be sent back to Earth. Today’s attempt is the first of three such touchdowns planned.
The brief landing will be challenging, because of the uneven and boulder-covered surface. Hayabusa2 is aiming for a 6-meter-diameter circle to avoid obstacles. Controllers will direct its approach until it is 500 meters above the surface, after which it will be on its own because it takes 20 minutes for commands to reach the craft.
The agency has compared landing in the circle to landing on a baseball mound from a height of 20 kilometers.
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