Evidence for Projectile Tunneling at Small Craters on Asteroid (101955) Bennu

Alan R Hildebrand1, Beau Bierhaus2, David Trang3, Kevin John Walsh4, Daniella DellaGiustina5, Bashar Rizk5, Christian d'Aubigny5, Robert W Gaskell6, Lucy F Lim5, Ronald -L Ballouz7, William F Bottke Jr8, Michael G Daly9, Jeff Seabrook10, Manar Al Asad11, Patrick Michel12, R. Terik Daly13, Scott A. Sandford14, Fabio Ciceri15, El Mahadia Ibrahim15, Jason P Dworkin16, Harold Connolly17, Stephen R Schwartz5 and Dante S Lauretta5, (1)University of Calgary, Calgary, AB, Canada, (2)Lockheed Martin, Denver, CO, United States, (3)University of Hawaiʻi at Mānoa, Honolulu, HI, United States, (4)University of Melbourne, Parkville, Australia, (5)University of Arizona, Lunar and Planetary Laboratory, Tucson, AZ, United States, (6)Planetary Science Institute Tucson, Tucson, AZ, United States, (7)University of Arizona, Tucson, United States, (8)Southwest Research Institute Boulder, Solar System Exploration Research Virtual Institute, Institute for the Science of Exploration Targets, Boulder, CO, United States, (9)York University, Centre for Research in Earth and Space Science, Toronto, ON, Canada, (10)York University, Toronto, ON, Canada, (11)University of British Columbia, Department of Earth, Ocean and Atmospheric Sciences, Vancouver, BC, Canada, (12)UNS-CNRS-Observatoire de la Cote d'Azur, Laboratoire Lagrange, NIce, France, (13)Johns Hopkins University Applied Physics Laboratory, Laurel, United States, (14)NASA Ames Research Center, Moffett Field, CA, United States, (15)University of Calgary, Geoscience, Calgary, AB, Canada, (16)NASA Goddard Space Flight Center, Solar System Exploration Division, Greenbelt, MD, United States, (17)Rowan University, Glassboro, United States