The Japan Aerospace Exploration Agency (JAXA) is delaying a spacecraft touchdown on an asteroid because scientists need more time to find a safe landing site on the extremely rocky surface.
The spacecraft Hayabusa2 left Earth in 2014 and traveled 280 million kilometers to the area of asteroid Ryugu, which it reached in June.
JAXA plans to attempt three brief touch-and-go landings on Ryugu to collect samples in hopes of gaining clues to the origin of the solar system and life on Earth.
However, the rockier-than-expected asteroid hardly has any flat spaces for landing, Hayabusa2 project manager Yuichi Tsuda said on Friday.
“Those rocks are our biggest headache,” Tsuda said. “Ryugu is extremely rocky and it’s almost cruel.”
He said his team needs at least a month to revise the landing plan, but is still hopeful.
“We will not let Hayabusa2 come back empty-handed,” Tsuda said earlier.
A one-month delay at this time of year means two more idle months, because the spacecraft will be on the other side of the sun from the Earth next month and in December, making it unable to communicate.
Scientists are analyzing data that Hayabusa2 collected when it moved close to the asteroid to release three rovers, as well as images and other data collected by the rovers, to determine the best landing spot.
Two Japanese Minerva II-1 rovers last month landed successfully on the asteroid and a German-French MASCOT rover landed last week. All have sent back surface images and data.
Hayabusa2 is to rehearse near-touchdown approaches to the asteroid later this month and obtain more data. Its first actual landing is expected in late January next year or beyond.
Before its final touchdown, now expected in May or June, Hayabusa2 is to send out a squat cylinder that is to detonate above the asteroid, shooting a projectile into it to form a crater where JAXA hopes that Hayabusa2 will land to collect samples before returning home in 2020.
Experts have said that the asteroid samples might contain organic compounds.
Asteroids, which orbit the sun, but are much smaller than planets, are among the oldest objects in the solar system and could help explain how Earth evolved, including the formation of oceans and the start of life.
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