Successful kinetic impact into an asteroid for planetary defence

R. Terik Daly, Carolyn M. Ernst, Olivier S. Barnouin, Nancy L. Chabot, Andrew S. Rivkin, Andrew F. Cheng, Elena Y. Adams, Harrison F. Agrusa, Elisabeth D. Abel, Amy L. Alford, Erik I. Asphaug, Justin A. Atchison, Andrew R. Badger, Paul Baki, Ronald L. Ballouz, Dmitriy L. Bekker, Julie Bellerose, Shyam Bhaskaran, Bonnie J. Buratti, Saverio CambioniMichelle H. Chen, Steven R. Chesley, George Chiu, Gareth S. Collins, Matthew W. Cox, Mallory E. DeCoster, Peter S. Ericksen, Raymond C. Espiritu, Alan S. Faber, Tony L. Farnham, Fabio Ferrari, Zachary J. Fletcher, Robert W. Gaskell, Dawn M. Graninger, Musad A. Haque, Patricia A. Harrington-Duff, Sarah Hefter, Isabel Herreros, Masatoshi Hirabayashi, Philip M. Huang, Syau Yun W. Hsieh, Seth A. Jacobson, Stephen N. Jenkins, Mark A. Jensenius, Jeremy W. John, Martin Jutzi, Tomas Kohout, Timothy O. Krueger, Frank E. Laipert, Norberto R. Lopez, Robert Luther, Alice Lucchetti, Declan M. Mages, Simone Marchi, Anna C. Martin, Maria E. McQuaide, Patrick Michel, Nicholas A. Moskovitz, Ian W. Murphy, Naomi Murdoch, Shantanu P. Naidu, Hari Nair, Michael C. Nolan, Jens Ormö, Maurizio Pajola, Eric E. Palmer, James M. Peachey, Petr Pravec, Sabina D. Raducan, K. T. Ramesh, Joshua R. Ramirez, Edward L. Reynolds, Joshua E. Richman, Colas Q. Robin, Luis M. Rodriguez, Lew M. Roufberg, Brian P. Rush, Carolyn A. Sawyer, Daniel J. Scheeres, Petr Scheirich, Stephen R. Schwartz, Matthew P. Shannon, Brett N. Shapiro, Caitlin E. Shearer, Evan J. Smith, R. Joshua Steele, Jordan K. Steckloff, Angela M. Stickle, Jessica M. Sunshine, Emil A. Superfin, Zahi B. Tarzi, Cristina A. Thomas, Justin R. Thomas, Josep M. Trigo-Rodríguez, B. Teresa Tropf, Andrew T. Vaughan, Dianna Velez, C. Dany Waller, Daniel S. Wilson, Kristin A. Wortman, Yun Zhang

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

Although no known asteroid poses a threat to Earth for at least the next century, the catalogue of near-Earth asteroids is incomplete for objects whose impacts would produce regional devastation1,2. Several approaches have been proposed to potentially prevent an asteroid impact with Earth by deflecting or disrupting an asteroid1–3. A test of kinetic impact technology was identified as the highest-priority space mission related to asteroid mitigation1. NASA’s Double Asteroid Redirection Test (DART) mission is a full-scale test of kinetic impact technology. The mission’s target asteroid was Dimorphos, the secondary member of the S-type binary near-Earth asteroid (65803) Didymos. This binary asteroid system was chosen to enable ground-based telescopes to quantify the asteroid deflection caused by the impact of the DART spacecraft4. Although past missions have utilized impactors to investigate the properties of small bodies5,6, those earlier missions were not intended to deflect their targets and did not achieve measurable deflections. Here we report the DART spacecraft’s autonomous kinetic impact into Dimorphos and reconstruct the impact event, including the timeline leading to impact, the location and nature of the DART impact site, and the size and shape of Dimorphos. The successful impact of the DART spacecraft with Dimorphos and the resulting change in the orbit of Dimorphos7 demonstrates that kinetic impactor technology is a viable technique to potentially defend Earth if necessary.

Original languageEnglish (US)
Pages (from-to)443-447
Number of pages5
JournalNature
Volume616
Issue number7957
DOIs
StatePublished - Apr 20 2023

ASJC Scopus subject areas

  • General

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