Asteroid Ryugu's parent body lost water due to intense heat

In December 2020, the Japanese Hayabusa 2 mission delivered soil from the near-Earth asteroid Ryugu to Earth. While analysis

With these samples in progress, researchers are analyzing data from other spacecraft instruments to uncover new details about the asteroid's history.

A new study suggestswhy Ryugu is not as rich in aquiferous minerals as some other asteroids. According to new work, the ancient parental body from which Ryugu was formed may have dried out as a result of the intense heat, even before Ryugu emerged.

One of the things we are trying to understand isthe distribution of water in the early solar system and how this water could have been brought to Earth. It is believed that it was partially brought in by aquiferous asteroids, so by carefully studying Ryuga, we can better understand the history of the Earth and near-Earth asteroids.

Ralph Milliken, Brown University planetary scientist and study co-author

One of the reasons why soil samples decidedtake it from Ryugu is that it belongs to the class of dark asteroids and possibly contains aquiferous minerals and organic compounds. It is believed that these types of asteroids are the putative parent bodies for the dark, water and carbon containing meteorites found on Earth, also called carbonaceous chondrites.

These meteorites have been studied in detail in laboratories.around the world for many decades, but it is impossible to determine with certainty from which asteroid a given carbonaceous-chondrite meteorite might originate.

New evidence suggests that the subsurfacewater is very similar to the outer surface. Therefore, Ryugu's body was probably initially dry. However, more work is needed to confirm this discovery, the researchers said. For example, the size of particles recovered from the subsurface can affect the interpretation of spectrometer measurements.

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An artificial object was found in soil samples from the asteroid Ryugu. Like this?