Astrophysical and Planetary Sciences Colloquium

Monday, October 12, 2020 at 12:40

https://cuboulder.zoom.us/j/96981439846

Seiji Sugita, University of Tokyo

"Remote-sensing observation results of asteroid Ryugu, comparison with Bennu, and outlook for returned sample analysis"

A Pretty Image from the Talk

Abstract:

An asteroid sample-return mission, Hayabsua2, reached a C-type asteroid Ryugu, which is thought to contain a lot of carbon and hydrated minerals in June 2018 and completed its remote-sensing observations, artificial cratering experiment, and two times of sampling by its departure in Nov. 2019. Now it is on the way back to the Earth for sample capsule drop off on 6th Dec. 2020. Hayabusa2's remote-sensing observations obtained new constraints on Ryugu's origin, such as its parent body, and evolution, such as aqueous alteration and thermal metamorphism within parent body, collisional breakup, orbital excursion, and despining. Furthermore, comparison with "sister asteroid" Bennu, the target of NASA's OSIRIS-REx mission, revealed that Ryugu's parent body and Bennu's were hit by different spectral types of asteroids. These findings have important implications for volatile transports in early Solar System and can be examined thoroughly with returned samples.

 

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