Hayabusa2 probe lands on asteroid

Hayabusa2

TOKYO — Japan’s Hayabusa2 probe landed successfully Thursday on a distant asteroid for a final touchdown, hoping to collect samples that could shed light on the evolution of the solar system.

“The touchdown is successful,” spokesman Takayuki Tomobe from the Japan Aerospace Exploration Agency (JAXA) told AFP.

The touchdown was greeted with cheering and applause in the JAXA mission control room, with officials grinning and shaking hands.

JAXA officials said earlier that the probe appeared to have landed successfully, but confirmation came only after Hayabusa2 lifted back up from the asteroid and resumed communications with the control room.

“All of us are relieved to see that the probe has resumed sending data from its antenna, which can send a large amount of data to us,” Tomobe said.

Research director Takashi Kubota told reporters that the touchdown operation was “more than perfect,” adding that project manager Yuichi Tsuda told the team: “we have made history.”

The brief landing Thursday is the second time Hayabusa2 has touched down on the desolate asteroid Ryugu, some 300 million kilometres (185 million miles) from Earth.

The complex multi-year mission has also involved sending rovers and robots down to the surface.

Thursday’s touchdown was intended to collect pristine materials from beneath the surface of the asteroid that could provide insights into what the solar system was like at its birth, some 4.6 billion years ago.

To get at those crucial materials, in April an “impactor” was fired from Hayabusa2 towards Ryugu in a risky process that created a crater on the asteroid’s surface and stirred up material that had not previously been exposed to the atmosphere.   

Hayabusa2’s first touchdown was in February, when it landed briefly on Ryugu and fired a bullet into the surface to puff up dust for collection, before blasting back to its holding position.

The second touchdown required special preparations because any problems could mean the probe would lose the precious materials already gathered during its first landing.

A photo of the crater taken by Hayabusa2’s camera after the April blast showed that parts of the asteroid’s surface are covered with materials that are “obviously different” from the rest of the surface, mission manager Makoto Yoshikawa told reporters before the latest touchdown.