Japan spacecraft carrying asteroid samples lands in Australia, agency says

Japan spacecraft carrying asteroid samples lands in Australia, agency says

Mari Yamaguchi

The Associated Press

Posted December 5, 2020 2:43 pm


Updated December 5, 2020 2:44 pm

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Japan’s Hayabusa2 spacecraft successfully released a small capsule on Saturday and sent it toward Earth to deliver samples from a distant asteroid that could provide clues to the origin of the solar system and life on our planet, the country’s space agency said.

The capsule successfully detached from 220,000 kilometres away in a challenging operation that required precision control, the Japan Aerospace Exploration Agency said. The capsule — just 40 centimetres in diameter — has landed Sunday in a remote, sparsely populated area of Woomera, Australia.

“The capsule has been separated. Congratulations,” JAXA project manager Yuichi Tsuda said.

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Hayabusa2 left the asteroid Ryugu, about 300 million kilometres away, a year ago. After it released the capsule, it moved away from Earth to capture images of the capsule descending toward the planet as it set off on a new expedition to another distant asteroid.

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About two hours later, JAXA said it had successfully rerouted Hayabusa2 for its new mission, as beaming staff exchanged fist and elbow touches at the agency’s command centre in Sagamihara, near Tokyo.

“We’ve successfully come this far, and when we fulfil our final mission to recover the capsule, it will be perfect,” mission manager Makoto Yoshikawa said from the command centre during a livestreaming event.

People who gathered to watch the capsule’s separation at public viewing events across Japan cheered the success. ”I’m really glad that the capsule has been successfully released. My heart was beating fast when I was watching,“ said Ichiro Ryoko, a 60-year-old computer engineer who watched at Tokyo Dome.

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Hayabusa2’s return with the world’s first asteroid subsurface samples comes weeks after NASA’s OSIRIS-REx spacecraft made a successful touch-and-go grab of surface samples from asteroid Bennu. China, meanwhile, announced this week that its lunar lander collected underground samples and sealed them within the spacecraft for their return to Earth, as space developing nations compete in their missions.

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In the early hours of Sunday, the capsule, protected by a heat shield, briefly turned into a fireball as it reentered the atmosphere 120 kilometres above Earth. At about 10 kilometres aboveground, a parachute opened to slow its fall and beacon signals were expected to be transmitted to indicate its location.

JAXA staff have set up satellite dishes at several locations in the target area to receive the signals. They also will use a marine radar, drones and helicopters to assist in the search and retrieval of the pan-shaped capsule.

Australian National University space rock expert Trevor Ireland, who is in Woomera for the arrival of the capsule, said he expected the Ryugu samples to be similar to the meteorite that fell in Australia near Murchison in Victoria state more than 50 years ago.

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“The Murchison meteorite opened a window on the origin of organics on Earth because these rocks were found to contain simple amino acids as well as abundant water,” Ireland said. “We will examine whether Ryugu is a potential source of organic matter and water on Earth when the solar system was forming, and whether these still remain intact on the asteroid.”

Scientists say they believe the samples, especially ones taken from under the asteroid’s surface, contain valuable data unaffected by space radiation and other environmental factors. They are particularly interested in analyzing organic materials in the samples.

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JAXA hopes to find clues to how the materials are distributed in the solar system and are related to life on Earth. Yoshikawa, the mission manager, said 0.1 gram of the dust would be enough to carry out all planned researches.

For Hayabusa2, it’s not the end of the mission it started in 2014. It is now heading to a small asteroid called 1998KY26 on a journey slated to take 10 years one way, for possible research including finding ways to prevent meteorites from hitting Earth.

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So far, its mission has been fully successful. It touched down twice on Ryugu despite the asteroid’s extremely rocky surface, and successfully collected data and samples during the 1 1/2 years it spent near Ryugu after arriving there in June 2018.

In its first touchdown in February 2019, it collected surface dust samples. In a more challenging mission in July that year, it collected underground samples from the asteroid for the first time in space history after landing in a crater that it created earlier by blasting the asteroid’s surface.

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Asteroids, which orbit the sun but are much smaller than planets, are among the oldest objects in the solar system and therefore may help explain how Earth evolved.

Ryugu in Japanese means “Dragon Palace,” the name of a sea-bottom castle in a Japanese folk tale.


Associated Press writers Dennis Passa in Brisbane, Australia, and Chisato Tanaka in Tokyo contributed to this report.

© 2020 The Canadian Press

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