R5: Extraterrestrial materials

[R5-09] Deposited materials on space weathered anhydrous minerals from asteroid Ryugu

*Toru Matsumoto¹, Takaaki Noguchi^1,2, Akira Miyake¹, Yohei Igami¹, Mitsutaka Haruta¹, Hikaru Saito², Satoshi Hata², Yusuke Seto³, Masaaki Miyahara⁴, Naotaka Tomioka⁵, Hisayoshi Yurimoto⁶, Tomoki Nakamura⁷, Hikaru Yabuta⁴, Hiroshi Naraoka², Ryuji Okazaki² (1. Kyoto Univ, 2. Kyushu Univ. , 3. Osaka Metropolitan Univ. Sci., 4. Hiroshima Univ. Sci., 5. JMASTEC, 6. Hokkaido Univ. Sci., 7. Tohoku Univ. Sci.)

Keywords:Hayabusa 2, Ryugu, Space weathering

Space weathering of carbonaceous asteroids has not been well understood. Ryugu samples will offer insights into the ongoing alteration of the regolith of Ryugu. We examined the space weathering of Ryugu samples as the initial analysis by the Mineralogy-Petrology Fine (Sand) sub-team. We found that the loss of volatiles and the resultant reduction of iron may represent the major modification of space weathering ongoing on the surface of Ryugu.