Patrick Michel is a senior researcher at CNRS (French National Center for Scientific Research), where he leads the Lagrange Laboratory planetary science team at the Côte d'Azur Observatory (Nice, France). He is the author of more than ninety publications in international peer-reviewed journals. Francesca E. DeMeo is a planetary scientist in the Department of Earth, Atmospheric, and Planetary Sciences at the Massachusetts Institute of Technology in Cambridge, Massachusetts. She is the author of more than forty refereed publications in international journals. William F. Bottke is the director of the Department for Space Studies at the Southwest Research Institute (SwRI) in Boulder, Colorado. He also is currently the director of the Institute for the Science of Exploration Targets (ISET) of NASA's SSERVI program, and is in charge of the Dynamical Evolution Working Group for NASA's OSIRIS-REx asteroid sample return mission. He is the author of more than 150 refereed articles.