The Pellas-Ryder Award, jointly sponsored by the Meteoritical Society and the Planetary Geology Division of the Geological Society of America, is for undergraduate and graduate students who are first author of a planetary science paper published in a peer-reviewed scientific journal. Any first author of a paper published on a topic listed on the cover of Meteoritics and Planetary Science who was a student when the paper was submitted is eligible for consideration for the award. The award was first given in 2002, and honors the memories of meteoriticist Paul Pellas and lunar scientist Graham Ryder.

Members are strongly urged to nominate candidates for the Pellas-Ryder Award. Yearly nomination deadline: January 31. The procedures for nominations may be found in the Pellas-Ryder Award Committee bylaws and rules.

Learn morePellas-Ryder Award Committee

Award Year Winner Institution Journal Year, Vol, Pages Title
2024 Ren Marquez Caltech The Astrophysical Journal Letters 2024, 961, L15 Snapshots of an Evolving Solar Nebula Recorded in Nucleosynthetic Sr and Ba Signatures of Early Condensates
2023 Hui Ching Jupiter Cheng University of Georgia Journal of Structural Geology 2022, 161, 104677 Structural relationships in and around the Rheasilvia basin on Vesta
2023 C. Adeene Denton Purdue University Geophysical Research Letters 2022, 49, e2022GL100516 Tracking the evolution of an ocean within Mimas using the Herschel impact basin
2022 Sarah Sutton University of Arizona Icarus 2022, 374, 114798 Sinuous channels east of Olympus Mons, Mars: Implications for volcanic, hydrological, and tectonic processes
2021 Jan L. Hellmann Institut für Planetologie, University of Münster, Germany Earth and Planetary Science Letters 2020, 549, 116508 Origin of volatile element depletion among carbonaceous chondrites
2020 Sabina Raducan Imperial College, London Icarus 2019, 329:282-295 The role of asteroid strength, porosity and internal friction in impact momentum transfer
2019 Simon J. Lock Harvard University Journal of Geophysical Research Planets 2018, 123, 910-951 The Origin of the Moon within a Terrestrial Synestia
2018 Worsham, Emily University of Maryland Earth and Planetary Science Letters 2017, 467, 157-166 Characterizing cosmochemical materials with genetic affinities to the Earth: Genetic and chronological diversity within the IAB iron meteorite complex
2017 Budde, Gerrit Wilhelms-Universität Münster Germany Proceedings of the National Academy of Sciences 2016, 113, 2886–2891 Tungsten isotopic constraints on the age and origin of chondrules
2017 Keane, James University of Arizona Nature 2016, 540(7631), 90-93 Reorientation and faulting of Pluto due to volatile loading within Sputnik Planitia
2016 Hanna, Romy University of Texas, Austin Geochimica et Cosmochimica Acta 2015, 171, 256-282 Impact-induced brittle deformation, porosity loss, and aqueous alteration in the Murchison CM chondrite
2016 Harrison, Tanya University of Western Ontario Icarus 2015, 252, 236-254 Global documentation of gullies with the Mars Reconnaissance Orbiter Context Camera and implications for their formation
2015 Battaglia, Steven Northern Illinois Univ.      
2014 Beitz, Eike Technische Universität Braunschweig Icarus 2013, 225, 558-569 Experiments on the consolidation of chondrites and the formation of dense rims around chondrules
2013 Burkhardt, Christoph ETH Zurich Earth Planetary Science Letters 2012, 357-358, 298-307 Origin of isotopic heterogeneity in the solar nebula by thermal processing and mixing of nebular dust
2012 Patthoff, Alex Univ. Idaho Geophysical Research Letters 2011, 38, L18201 A fracture history on Enceladus provides evidence for a global ocean
2011 Beck, Andrew W. Univ. Tennessee Meteoritics and Planetary Science 2010, 45, 850-872 Diogenites as polymict breccias composed of orthopyroxenite and harzburgite
2010 Reddy, Vishnu Univ. North Dakota MAPS 2009, 44, 1917-1927 Composition of 298 Baptistina: Implications for the K/T impactor link
2009 Ehlmann, Bethany Brown University Science 2008, 322, 1828-1832 Orbital identification of carbonate-bearing rocks on Mars
2008 Touboul, Matthieu ETH Nature 2007, 450, 1206-1209 Late formation and prolonged differentiation of the Moon inferred from W isotopes in lunar metals
2007 Richardson, James E. Jr. Univ. Arizona Icarus 2005, 179, 325-349 The global effects of impact-induced seismic activity on fractured asteroid surface morphology
2007* Toppani, Alice CRPG-CNRS GCA 2006, 70, 5035-5060 Laboratory condensation of refractory dust in protosolar and circumstellar conditions
2006 Wyrick, Danielle Univ. Texas, San Antonio JGR-Planets 2004, 109, E06005 Distribution, Morphology and Origins of Martian Pit Crater Chains
2005 Itoh, Soichi Tokyo Inst. Tech. Nature 2003, 423, 728-731 Contemporaneous formation of chondrules and refractory inclusions in the early Solar System
2004 Dauphas, Nicolas CRPG-CNRS Astrophys. J. 2002, 565, 640-644 Molybdenum evidence for inherited planetary scale isotope heterogeneity in the protosolar nebula
2003 Davidsson, Björn Uppsala University Icarus 2001, 149, 375-383 Tidal splitting and rotational breakup of solid biaxial ellipsoids
2002 Johnson, Natasha Washington Univ. Icarus 2000, 146, 301-306 Water on Venus: New Insights from Tremolite Decomposition

* Timing of award adjusted by presenting two in same year