{"id":891428,"date":"2026-09-11T06:32:46","date_gmt":"2026-09-11T06:32:46","guid":{"rendered":"https:\/\/www.newsbeep.com\/ca\/891428\/"},"modified":"2026-09-11T06:32:46","modified_gmt":"2026-09-11T06:32:46","slug":"japan-determines-when-ryugus-parent-body-formed","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/ca\/891428\/","title":{"rendered":"Japan determines when Ryugu\u2019s parent body formed"},"content":{"rendered":"

A research group from Hokkaido University and other institutions in Japan has established that the parent celestial body of the asteroid Ryugu formed within 2 million years after the beginning of the Solar System\u2019s formation about 4.6 billion years ago. The results were published in the U.S. scientific journal Science, The Japan Times reports<\/a>.<\/p>\n

Analysis of samples from Ryugu<\/p>\n

Scientists studied minerals in sand samples collected from the asteroid by Japan\u2019s Hayabusa2 spacecraft. The probe delivered these samples to Earth in 2020.<\/p>\n

The samples contain minerals and organic matter formed as a result of reactions between rock and water. The water appeared after ice melted, as the temperature inside the parent body gradually rose due to heat released by radioactive materials.<\/p>\n

More current news is available on the UA.News Telegram channel Telegram<\/a>.<\/p>\n

Dolomite as an age indicator<\/p>\n

Associate Professor Noriyuki Kawasaki of Hokkaido University and his colleagues determined the age of dolomite, a carbonate mineral from the Ryugu samples, using radioisotopes. To improve accuracy, they applied a new method for correcting errors and reconstructed temperature changes inside the parent body through computer modeling.<\/p>\n

The analysis showed that dolomite formed about 4.56 billion years ago at a temperature of around 90 degrees Celsius. Taking into account the time needed to heat up to this level, the team concluded that Ryugu\u2019s parent body formed within 2 million years of the beginning of the Solar System\u2019s formation.<\/p>\n

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\n <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"A research group from Hokkaido University and other institutions in Japan has established that the parent celestial body…\n","protected":false},"author":2,"featured_media":891429,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[49,48,66],"class_list":["post-891428","post","type-post","status-publish","format-standard","has-post-thumbnail","category-science","tag-ca","tag-canada","tag-science"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/891428","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/comments?post=891428"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/891428\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media\/891429"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media?parent=891428"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/categories?post=891428"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/tags?post=891428"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}