Author
Listed:
- Cristina A. Thomas
(Northern Arizona University)
- Shantanu P. Naidu
(California Institute of Technology)
- Peter Scheirich
(Astronomical Institute of the Czech Academy of Sciences)
- Nicholas A. Moskovitz
(Lowell Observatory)
- Petr Pravec
(Astronomical Institute of the Czech Academy of Sciences)
- Steven R. Chesley
(California Institute of Technology)
- Andrew S. Rivkin
(Johns Hopkins University Applied Physics Laboratory)
- David J. Osip
(Las Campanas Observatory)
- Tim A. Lister
(Las Cumbres Observatory)
- Lance A. M. Benner
(California Institute of Technology)
- Marina Brozović
(California Institute of Technology)
- Carlos Contreras
(Las Campanas Observatory)
- Nidia Morrell
(Las Campanas Observatory)
- Agata Rożek
(University of Edinburgh, Royal Observatory)
- Peter Kušnirák
(Astronomical Institute of the Czech Academy of Sciences)
- Kamil Hornoch
(Astronomical Institute of the Czech Academy of Sciences)
- Declan Mages
(California Institute of Technology)
- Patrick A. Taylor
(National Radio Astronomy Observatory)
- Andrew D. Seymour
(Green Bank Observatory)
- Colin Snodgrass
(University of Edinburgh, Royal Observatory)
- Uffe G. Jørgensen
(University of Copenhagen)
- Martin Dominik
(University of St Andrews)
- Brian Skiff
(Lowell Observatory)
- Tom Polakis
(Lowell Observatory)
- Matthew M. Knight
(United States Naval Academy)
- Tony L. Farnham
(University of Maryland)
- Jon D. Giorgini
(California Institute of Technology)
- Brian Rush
(California Institute of Technology)
- Julie Bellerose
(California Institute of Technology)
- Pedro Salas
(Green Bank Observatory)
- William P. Armentrout
(Green Bank Observatory)
- Galen Watts
(Green Bank Observatory)
- Michael W. Busch
(SETI Institute)
- Joseph Chatelain
(Las Cumbres Observatory)
- Edward Gomez
(Las Cumbres Observatory
Cardiff University)
- Sarah Greenstreet
(University of Washington)
- Liz Phillips
(Las Cumbres Observatory
University of California, Santa Barbara)
- Mariangela Bonavita
(University of Edinburgh, Royal Observatory)
- Martin J. Burgdorf
(Universität Hamburg)
- Elahe Khalouei
(Seoul National University)
- Penélope Longa-Peña
(Universidad de Antofagasta)
- Markus Rabus
(Universidad Católica de la Santísima Concepción)
- Sedighe Sajadian
(Isfahan University of Technology)
- Nancy L. Chabot
(Johns Hopkins University Applied Physics Laboratory)
- Andrew F. Cheng
(Johns Hopkins University Applied Physics Laboratory)
- William H. Ryan
(New Mexico Institute of Mining and Technology)
- Eileen V. Ryan
(New Mexico Institute of Mining and Technology)
- Carrie E. Holt
(University of Maryland)
- Harrison F. Agrusa
(University of Maryland)
Abstract
The Double Asteroid Redirection Test (DART) spacecraft successfully performed the first test of a kinetic impactor for asteroid deflection by impacting Dimorphos, the secondary of near-Earth binary asteroid (65803) Didymos, and changing the orbital period of Dimorphos. A change in orbital period of approximately 7 min was expected if the incident momentum from the DART spacecraft was directly transferred to the asteroid target in a perfectly inelastic collision1, but studies of the probable impact conditions and asteroid properties indicated that a considerable momentum enhancement (β) was possible2,3. In the years before impact, we used lightcurve observations to accurately determine the pre-impact orbit parameters of Dimorphos with respect to Didymos4–6. Here we report the change in the orbital period of Dimorphos as a result of the DART kinetic impact to be −33.0 ± 1.0 (3σ) min. Using new Earth-based lightcurve and radar observations, two independent approaches determined identical values for the change in the orbital period. This large orbit period change suggests that ejecta contributed a substantial amount of momentum to the asteroid beyond what the DART spacecraft carried.
Suggested Citation
Cristina A. Thomas & Shantanu P. Naidu & Peter Scheirich & Nicholas A. Moskovitz & Petr Pravec & Steven R. Chesley & Andrew S. Rivkin & David J. Osip & Tim A. Lister & Lance A. M. Benner & Marina Broz, 2023.
"Orbital period change of Dimorphos due to the DART kinetic impact,"
Nature, Nature, vol. 616(7957), pages 448-451, April.
Handle:
RePEc:nat:nature:v:616:y:2023:i:7957:d:10.1038_s41586-023-05805-2
DOI: 10.1038/s41586-023-05805-2
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Citations
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Cited by:
- J. Bigot & P. Lombardo & N. Murdoch & D. J. Scheeres & D. Vivet & Y. Zhang & J. Sunshine & J. B. Vincent & O. S. Barnouin & C. M. Ernst & R. T. Daly & C. Sunday & P. Michel & A. Campo-Bagatin & A. Luc, 2024.
"The bearing capacity of asteroid (65803) Didymos estimated from boulder tracks,"
Nature Communications, Nature, vol. 15(1), pages 1-11, December.
- Elisabetta Dotto & Angelo Zinzi, 2023.
"Impact observations of asteroid Dimorphos via Light Italian CubeSat for imaging of asteroids (LICIACube),"
Nature Communications, Nature, vol. 14(1), pages 1-3, December.
- Adriano Campo Bagatin & Aldo Dell’Oro & Laura M. Parro & Paula G. Benavidez & Seth Jacobson & Alice Lucchetti & Francesco Marzari & Patrick Michel & Maurizio Pajola & Jean-Baptiste Vincent, 2024.
"Recent collisional history of (65803) Didymos,"
Nature Communications, Nature, vol. 15(1), pages 1-9, December.
- M. Pajola & F. Tusberti & A. Lucchetti & O. Barnouin & S. Cambioni & C. M. Ernst & E. Dotto & R. T. Daly & G. Poggiali & M. Hirabayashi & R. Nakano & E. Mazzotta Epifani & N. L. Chabot & V. Corte & A., 2024.
"Evidence for multi-fragmentation and mass shedding of boulders on rubble-pile binary asteroid system (65803) Didymos,"
Nature Communications, Nature, vol. 15(1), pages 1-13, December.
- Marco Cinelli, 2024.
"Mitigation of the Collision Risk of a Virtual Impactor Based on the 2011 AG5 Asteroid Using a Kinetic Impactor,"
Mathematics, MDPI, vol. 12(3), pages 1-20, January.
- Colas Q. Robin & Alexia Duchene & Naomi Murdoch & Jean-Baptiste Vincent & Alice Lucchetti & Maurizio Pajola & Carolyn M. Ernst & R. Terik Daly & Olivier S. Barnouin & Sabina D. Raducan & Patrick Miche, 2024.
"Mechanical properties of rubble pile asteroids (Dimorphos, Itokawa, Ryugu, and Bennu) through surface boulder morphological analysis,"
Nature Communications, Nature, vol. 15(1), pages 1-11, December.
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