Hayabusa2 Reentry Capsule Retrieval and Sample Container Opening Operations Shogo Tachibana (U.Tokyo/JAXA) on behalf of the Hayabusa2 team (c) JAXA, U. Tokyo, Kochi U., Rikkyo Univ., Nagoya U., ChiTech., Meiji U. U. Aizu, Kyushu U., AIST, DLR, CNESS | all the images in this talk Hayabusa2 Mission to return pristine asteroidal surface samples from a C-type asteroid Ryugu (162173) Ryugu Projectile shooting Re-entry capsule Extendable Sample sampler catcher 5-g Ta bullet horn [300 m/s] (1 m long) Sample container Tachibana et al. (2014); Okazaki et al. (2017); Sawada et al. (2017) Touch-down operations February 22, 2019 July 11, 2019 Capsule retrieval operation The reentry capsule trajectory! Quick Look Facility Mt. Fuji Dec. 8 Dec. 8–11 Dec. 8 Clean chamber CC4-1 CC3-3 CC3-2 CC4-2 CC3-1 Chamber A particles (TD1) Chamber C particles (TD2) 5 mm 5 mm Chamber A particles (TD1) 3.1 g 5 mm Chamber C particles (TD2) 2.0 g Pebbles and sands! Particles were found in two separate chambers used for two landing operations at Ryugu, indicating that the samples at the different surface locations were obtained successfully The particles were black in color, consistent with the color of Ryugu boulders Millimeter- to centimeter-sized pebbles are present. Centimeter-sized grains, close to the maximum obtainable size, are found in the sample obtained during the second landing operation nearby the artificial crater Pebbles and sands! The total weight of the sample exceeds 5 g, far more than the mission requirement (0.1 g) The Hayabusa2 sampler system worked efficiently and effectively at the Ryugu surface. The sample collected looks well representative of Ryugu. >4.6 Ga Presolar grain formation around evolved stars Nucleosynthesis, Interstellar process, Interstellar residence time, Indicator of SS and asteroidal processes ~4.6 Ga Molecular cloud chemistry Low-temperature photochemical Sample Analysis Sample process, Formation of ice and organic matter ~4.567 Ga Pre-accretional evolution in the protosolar disk CAI & Chondrule formation, Material transport, Chemical evolution Thermal metamorphism / Aqueous alteration Parent Mineral–Water–Organics Planetesimal interaction, Factory of of Ryugu bio-related molecules? Tachibana+ (2014) Major breakup(s) / Impacts Collisions! Formation of Ryugu as a rubble pile 1 km Exposure of rocks with different histories Sample Analysis Sample inside the parent planetesimal main belt Orbital evolution to the near-Earth orbit Dynamics of small bodies Current surface geology Space weathering, particle movement Tachibana+ (2014) Samples are back. More will be soon!.