This week: a seminar/conference on the returned samples from Ryugu and Bennu, and their implications:
https://www.hou.usra.edu/meetings/bennuryugu2025/
Bennu and Ryugu: Samples from the Early Solar System Workshop
October 7–9, Lunar and Planetary Institute, Houston
On the (very rich) agenda (www.hou.usra.edu/meetings/bennuryugu2025/technical_program/):
Tuesday, October 7, 2025
Bennu and Ryugu: A Treasure Trove of Organics and Minerals
Barnes, J. J. et al.- A Geochemical and Isotopic View of the Formation and Evolution of Bennu’s Parent Body [#2054]
Koga, T. et al.- Comparative Analysis of Water-Soluble Organic Molecules in Ryugu and Bennu Using Capillary Electrophoresis/High-Resolution Mass Spectrometry [#2009]
Yoshimura, T. et al.- Soluble Organosulfur Molecules in Two Carbonaceous Asteroids: Bennu and Ryugu [#2038]
Hirakawa, Y. et al.- Organic Phosphorus in Asteroid Bennu Samples: New Insight into C-P Chemistry and Molecular Evolution [#2010]
Takase, T. et al.- FT‑IR and Synchrotron XRD Analyses of Samples from Asteroids Ryugu and Bennu: Spectral and Mineralogical Diversity at the Sub‑Millimeter Scale [#2025]
Ishida, S. et al.- Direct Spectral Comparison of Bennu and Ryugu Samples Reveals Diffrent Degrees of Aqueous Alteration [#2032]
Foustoukos, D. I. et al.- Ammonia in the Asteroid Bennu: Abundance and Isotopic (N, H) Composition [#2015]
Mojarro, A. et al.- Stones from Asteroid Bennu Preserve Distinct Episodes of Aqueous Alteration [#2051]
Baklouti, D. et al.- Chemical and Astrophysical Implications of the Discovery of Hydrated Ammonium-Magnesium-Phosphorus-Rich (HAMP) Grains in Ryugu Samples [#2011]
Unraveling Aqueous and Organic Histories of Bennu and Ryugu
Zega, T. J. et al.- The Mineralogical Evidence for Hydrothermal Alteration of Bennu Samples [#2019]
Zolensky, M. et al.- Analysis of Asteroid Ryugu Aqueous Fluid Inclusions [#2007]
Libourel, G. et al.- What Bennu’s Carbonates Reveal About Its Parent Body [#2016]
Tachibana, S. et al.- Magnesium Phosphates and Carbonates as Potential Surface Thermometers for Ryugu and Bennu [#2042]
Liu, X. et al.- Elemental Mobility and Aqueous Alteration on Asteroid Bennu: Insights from Leaching Experiments [#2043]
Kontogiannis, M. K. et al.- Sulfide Mineralogy in Bennu Lithologies [#2066]
Flynn, G. J. et al.- Aqueous Processing on the Ryugu Parent Body: Similarities and Differences Between Ryugu and Bennu [#2053]
Naraoka, H. et al.- Polyphosphates in Water Extracts of Bennu Samples [#2034]
Matsumoto, Y. et al.- Detection of Acetaldehyde from Ryugu Grains [#2030]
Clemett, S. J. et al.- Aromatic Hydrocarbons, Nanoglobules, and Macromolecular Organic Matter in Samples from Asteroid (101995) Bennu [#2021]
Buckner, D. K. et al.- Carboxylic Acids and Their Carbon Isotope Composition in Bennu Samples [#2049]
Wednesday, October 8, 2025
Primordial Secrets and Chemistry of Bennu and Ryugu
Lauretta, D. S.- Are Bennu and Ryugu Fragments of a Common Progenitor Asteroid? [#2058]
Goodrich, C. A. et al.- Exploring the Diversity of CI-like Materials in the Early Solar System with Samples of Ryugu, Bennu, and CC Xenoliths in Polymict Ureilites [#2013]
Tsuchiyama, A. et al.- Particles in Bennu Samples That Escaped Significant to Moderate Aqueous Alteration [#2026]
Portail, M. et al.- Long-Persistent Luminescence as a Tool for Discriminating Olivine Grains from Bennu Samples [#2017]
Thomas-Keprta, K. et al.- Chondrule Fragments in Returned Samples from Asteroid Bennu [#2037]
Genge, M. J. et al.- Microchondrule in Ryugu and Bennu: An Indicator of Intense Turbulence [#2035]
Hammett, M. et al.- Petrologic Identification and Examination of Anhydrous Silicates in Ryugu Aggregate Samples [#2046]
Wang, K. et al.- Revisiting the Solar System Bulk Composition Through Asteroid Bennu Samples [#2024]
Broussard, M. et al.- CI Chondrite Oued Chebeika 002: A Primordial Proxy Linking Bennu and Ryugu [#2022]
Lodders, K. et al.- Solar System Abundances: The Sun, the CI-Chondrites, and the Asteroids Bennu and Ryugu [#2055]
Multi-Scale Asteroid Science of Bennu and Ryugu: Origins, Surface Properties, and Chemistry
Thompson, M. S. et al.- The Nature of Nanophase Inclusions in Space Weathered Bennu Samples [#2014]
Angrisani, M. et al.- Space Weathering and Regolith Dynamics on Ryugu: Lessons from Ryugu Sample Analysis [#2036]
Keller, L. P. et al.- Surface Exposure Ages of Bennu Regolith Particles [#2040]
Palomba, E. et al.- Space Weathering Variations Across Ryugu Surface: Evidence from Two Hayabusa2 Sample Particles [#2044]
Hamilton, V. E. et al.- Spectral Properties of Bennu Samples in the Context of Remote Sensing [#2012]
Sugita, S. et al.- Toward Four-Way Onsite-Sample Comparison of Optical Spectra of Ryugu and Bennu [#2048]
Belhadfa, E. C. et al.- Spectral Variability and Compositional Insights from Asteroid (101955) Bennu’s VNIR Remote Observations [#2005]
Takir, D. et al.- Infrared Spectroscopy of the Bennu Sample OREX-800084-0: Implications for Primitive Inner Main Belt Asteroids [#2062]
Watanabe, S. et al.- A Planet Formation Theory that Explains the Isotopic Distribution in the Solar System [#2028]
Yabuta, H. et al.- Comparison Study of Macromolecular Organic Matter Between Asteroids Bennu and Ryugu [#2063]
Stroud, R. M. et al.- Comparative Analysis of Oued Chebeika 002 Organic Matter with Bennu and Ryugu [#2057]
Koga, T. et al.- Nucleobases in Ryugu, Bennu, and Carbonaceous Meteorites [#2008]
Thursday, October 9, 2025
Inside the Vaults: Curation Breakthroughs for Bennu and Ryugu Samples
Pilorget, C. et al.- Compositional Diversity in Pristine Bennu Samples Revealed by the NIR Hyperspectral Microscope MicrOmega at JAXA Curation Center and Comparison with Ryugu Samples [#2041]
Lunning, N. G. et al.- X-ray Computed Tomography Scanning of NASA Pristine Bennu Samples: Collection Preservation and Selection Process. [#2004]
Eckley, S. A. et al.- Pristine X-ray Computed Tomography Imaging of Stones Returned from Asteroid Bennu [#2018]
Hanna, R. D. et al.- 3D Porosity Structure of Bennu Particle OREX-800084-0 [#2056]
Tsutsui, K. et al.- Comparison of 3D Structure and Bulk Mineralogy Between Ryugu and Bennu Samples Using the Same Synchrotron CT and XRD Methodology [#2033]
Harrington, R. S. et al.- Polishing Samples Without Liquids [#2050]
Plummer, J. L. et al.- Ultramicrotomy Sample Preparation of Bennu Particles at NASA Johnson Space Center [#2003]
Rivera, E. V. et al.- No Opener? No Problem: Clamp-Only Approach for Opening Eagle Stainless-Steel Tri-Clamp Containers for OSIRIS-REx [#2027]
Pando, K. M. et al.- Requesting Asteroid Bennu Samples from the NASA OSIRIS-REx Curation Laboratory [#2006]
Bennu and Ryugu: Continuing to Expand the Story
Seifert, L. B. et al.- Coordinated Analyses of a Graphite Spherule Found in Sample from Asteroid Ryugu [#2039]
Borlina, C. S. et al.- Potential Evidence of a Solar Nebula Magnetic Field in Samples Returned from Bennu [#2020]
Bristol, K. E. et al.- Magnetized in Brines: Evidence for Robust Magnetic Carriers from Bennu’s Returned Samples [#2045]
Fu, R.-R. et al.- Preliminary paleomagnetic analysis of Bennu samples [#2060]
Vega-Santiago, N. et al.- Petrological and Chemical Characterization of Mg, Na-Rich Phosphate Phases in Bennu Returned Samples [#2065]
Cody, G. D. et al.- Insight into Bennu’s phosphates via 31P Solid-State Nuclear Magnetic Resonance (NMR) Spectroscopy [#2031]
Northrup, P. et al.- Differences in Localized Chemical Speciation of Phosphorus, Sulfur and Carbonates in Bennu vs. Ryugu Samples, Using Tender-Energy X-ray Microspectroscopy [#2052]
Tkalcec, B. J. et al.- Rare-Earth Element Distribution in Cross-Cutting Veins in a Bennu Rock Fragment: Comparison with Bennu and Ryugu Apatites [#2047]
Lehnert, K. A. et al.- Bennu and Ryugu Sample Analysis Data at the Astromaterials Data System [#2059]