Infrared images show that Ryugu is almost entirely made up.
The asteroid was formed largely from fragments of a parent body that was shattered by impacts of highly porous material.
DLR scientists participate in the publication in the scientific journal Nature.
COLOGNE, Germany (DLR PR) — The Solar System formed approximately 4.5 billion years ago. Numerous fragments that bear witness to this early era orbit the Sun as asteroids. Around three-quarters of these are carbon-rich C-type asteroids, such as 162173 Ryugu, which was the target of the Japanese Hayabusa2 mission in 2018 and 2019. The spacecraft is currently on its return flight to Earth.
Numerous scientists, including planetary researchers from the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR), intensively studied this cosmic ‘rubble pile’, which is almost one kilometre in diameter and can come close to Earth. Infrared images acquired by Hayabusa2 have now been published in the scientific journal Nature. They show that the asteroid consists almost entirely of highly porous material.
KOBE, Japan (Kobe University PR) — Analysis of the impact craters on Ryugu using the spacecraft Hayabusa 2’s remote sensing image data has illuminated the geological history of the Near-Earth asteroid.
A research group led by Assistant Professor Naoyuki Hirata of the Department of Planetology at Kobe University’s Graduate School of Science revealed 77 craters on Ryugu. Through analyzing the location patterns and characteristics of the craters, they determined that the asteroid’s eastern and western hemispheres were formed at different periods of time.
GREENBELT, Md. (NASA PR) — An international team has found sugars essential to life in meteorites. The new discovery adds to the growing list of biologically important compounds that have been found in meteorites, supporting the hypothesis that chemical reactions in asteroids – the parent bodies of many meteorites – can make some of life’s ingredients. If correct, meteorite bombardment on ancient Earth may have assisted the origin of life with a supply of life’s building blocks.
Japan’s Hayabusa2 spacecraft is not scheduled to return its precious cargo of soil samples of asteroid Ryugu to Earth for 16 more months, but it has already begun to pack up for home.
“In an operation today (August 26), the sample catcher was stored in the re-entry capsule (see figure). The sampler and capsule teams gathered to watch and the operation was completed successfully. The capsule is now ready for Earth return!” JAXA tweeted.
The asteroid is similar to carbonaceous, 4.5 billion year old meteorites found in collections on Earth.
Ryugu has numerous cavities.
COLOGNE, Germany (DLR PR) — In the summer of 2018, the asteroid Ryugu, which measures only approximately 850 metres across, was visited by the Japanese Hayabusa2 spacecraft. On board was the 10-kilogram German-French Mobile Asteroid Surface Scout (MASCOT) – a lander no bigger than a microwave oven and equipped with four instruments.
From the folktale of the “rolling rice ball”. This was chosen as the boulders in this vicinity are shaped like Japanese rice balls and may roll down into the crater. The crater will also continue to be referred to as the “SCI crater”, depending on the situation.
In memory of Yuichi Iijima. Dr Iijima worked to gain the cooperation from universities outside JAXA during the start-up of the Hayabusa2 Project and so laid the foundation for Project’s success. In particular, in order to maximise the scientific results from the impact experiment, he worked hard across different fields and focussed on the proposal and development for the digital deployable camera for scientific observation (DCAM3). Dr Iijima passed away on December 7, 2012.
In memory of Chisato Okamoto. Dr Okamoto was one of the core members of the Hayabusa2 sampler development team and energetically repeated laboratory experiments in preparation for collecting samples on Ryugu. She was also a member of the impact experiment team and played a central role in the simulation of the asteroid surface conditions used for the impact experiment in Kamioka. Dr Okamoto passed away on July 25, 2018.
An onigiri is a Japanese rice ball (sometimes the shape is triangular) and resembles this boulder. (Both omusubi and onigiri mean rice ball.)
TOKYO (JAXA PR) — This report concerns the current status of the return and recovery plan of the Hayabusa2 sample return capsule.
At the end of 2020, Hayabusa2 plans to return to the Earth with the
samples collected from asteroid Ryugu. As with the recovery of the first
Hayabusa in 2010, JAXA is currently working with the Australian
Government to support the recovery of the Hayabusa2 re-entry capsule in
2020 at the Woomera Prohibited Area (WPA) located in the outback desert
of South Australia.
CANBERRA (Australian Space Agency PR — To learn more about the solar system’s origin and evolution, the Japan Aerospace Exploration Agency (JAXA) is investigating typical types of asteroids. Analysing samples from asteroids enables us to study organic matter and water in the solar system.
COLOGNE, Germany (DLR) PR) — Ryugu and other asteroids of the common ‘C-class’ consist of more porous material than was previously thought. Small fragments of their material are therefore too fragile to survive entry into the atmosphere in the event of a collision with Earth.
This has revealed the long-suspected cause of the deficit of this meteorite type in finds on Earth. Researchers at the German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR) have come to this conclusion in a scientific paper published in the journal Nature Astronomy.
TOKYO (JAXA PR) — Today (July 11), the Hayabusa2 spacecraft performed a second touchdown on the surface of asteroid Ryugu. The touchdown occurred at 10:06 JST at the on board time and was successful.
From the data sent from Hayabusa2, it has been confirmed that the touchdown sequence, including the discharge of a projectile for sampling, was completed successfully. Hayabusa2 is functioning normally, and thus the second touchdown ended with success.
Below we show images taken before and after the touchdown. As this is a quick bulletin, more detailed information will be given in the future.
TOKYO (JAXA PR) — The Japan Aerospace Exploration Agency [JAXA] has agreed to cooperate with Centre National d’Etudes Spatiales (CNES) on the study-phase activities in JAXA’s Martian Moons eXploration (MMX) mission and analysis of Hayabusa2-returned samples.