Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites

Bibcode
2023Sci...379.7850Y
DOI
10.1126/science.abn7850
Yokoyama, T.; Tatsumi, E.
Referencia bibliográfica

Science

Fecha de publicación:
3
2023
Revista
Science
Número de autores
2
Número de autores del IAC
1
Número de citas
17
Número de citas referidas
17
Descripción
Carbonaceous meteorites are thought to be fragments of C-type (carbonaceous) asteroids. Samples of the C-type asteroid (162173) Ryugu were retrieved by the Hayabusa2 spacecraft. We measure the mineralogy, bulk chemical and isotopic compositions of Ryugu samples. They are mainly composed of materials similar to carbonaceous chondrite meteorites, particularly the CI (Ivuna-type) group. The samples consist predominantly of minerals formed in aqueous fluid on a parent planetesimal. The primary minerals were altered by fluids at a temperature of 37 ± 10°C, 5.2+0.7−0.8 (Stat.) +1.6−2.1 (Syst.) million years after formation of the first solids in the Solar System. After aqueous alteration, the Ryugu samples were likely never heated above ~100°C. The samples have a chemical composition that more closely resembles the Sun’s photosphere than other natural samples do.
Proyectos relacionados
Imagen del Proyecto
Pequeños Cuerpos del Sistema Solar

Este Proyecto estudia las propiedades físicas y composicionales de los llamados pequeños cuerpos del Sistema Solar, que incluyen asteroides, objetos helados y cometas. Entre los grupos de mayor interés destacan los objetos trans-neptunianos (TNOs), incluyendo los objetos más lejanos detectados hasta la fecha (Extreme-TNOs o ETNOs); los cometas, y

Julia de
León Cruz
En ejecución
Tipo
Con árbitro
Meteoritos
Asteroides
Sistema Solar y Sistemas Planetarios (SEYSS)

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