Asteroid Ryugu is one of the most celebrated Near - Earth Objects . It was visited by the Japanese probeHayabusa-2a few years ago and the spacecraft collected samples from its surface and below it . psychoanalysis of this material has discover incredible sixth sense about Ryugu and the late inquiry preserve this trend . It found an important connection with comet Wild 2 and the outer solar system .
angry 2 ( pronouncedvilt two ) was visited by NASA ’s Stardust mission which collected mote from the comet ’s comatoseness – the fuzzy atmosphere that spring when a comet gets closer to the Sun . The comet formed and used to be further out in the solar system of rules but in September 1974 , lead very near to Jupiter , it was displume ahead into the privileged solar organization .
Ryugu ’s account seems to be more complicated . The depth psychology publish earlier this year revealedamino acids , the construction stoppage of protein , as well as carbonate mineral that are expected to organise in weewee - deep environs at low temperatures . This can not have been the inner solar system . In particular , Ryugu showed law of similarity to theIvuna meteorite . This space sway fell in Tanzania on December 16 , 1938 , and it is part of the CI mathematical group of carbonaceous chondrite . With only nine of them in the world , the CI chemical group is one of the rare .
Chemical psychoanalysis of the isotopic typography of copper and Zn in both Ryugu and Ivuna shows once againremarkable similarity . Isotopes are versions of the same chemical substance constituent with unlike peck due to the presence of extra neutron in the nucleus . This chemical substance fingermark delivers very intriguing insights into the composition and formation story .
Ryugu contains some material though that could n’t have formed in the outer solar system . Minerals such as olivine , spinel , and perovskite must have formed at high temperatures . And isotopic signatures of oxygen-16 in these mineral show that some of them are rich in this isotope of O and some are piteous . But the ratio is very similar to the CI chondrite and different from other carbonaceous meteorites .
And what ’s very interesting is that the proportion is also similar to the comet dust collected from Wild 2 , another crucial connection between Ryugu and the outer solar organisation . These findings suggest that asteroid Ryugu and the CI chondrite formed closer to the region where comets accrete material but that those minerals that formed in the inner solar scheme were convey outwards before the place body brought them back closer to Earth .
The findings are reported inScience Advances .
