Predictions for the Dynamical States of the Didymos System before and after the Planned DART Impact
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Título: | Predictions for the Dynamical States of the Didymos System before and after the Planned DART Impact |
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Autor/es: | Richardson, Derek C. | Agrusa, Harrison F. | Barbee, Brent | Bottke, William F. | Cheng, Andy F. | Eggl, Siegfried | Ferrari, Fabio | Hirabayashi, Masatoshi | Karatekin, Ozgür | McMahon, Jay | Schwartz, Stephen R. | Ballouz, Ronald-Louis | Campo Bagatin, Adriano | Dotto, Elisabetta | Fahnestock, Eugene G. | Fuentes-Muñoz, Oscar | Gkolias, Ioannis | Hamilton, Douglas P. | Jacobson, Seth A. | Jutzi, Martin | Lyzhoft, Josh | Makadia, Rahil | Meyer, Alex J. | Michel, Patrick | Nakano, Ryota | Noiset, Guillaume | Raducan, Sabina D. | Rambaux, Nicolas | Rossi, Alessandro | Sánchez, Paul | Scheeres, Daniel J. | Soldini, Stefania | Stickle, Angela M. | Tanga, Paolo | Tsiganis, Kleomenis | Zhang, Yun |
Grupo/s de investigación o GITE: | Astronomía y Astrofísica |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Física, Ingeniería de Sistemas y Teoría de la Señal | Universidad de Alicante. Instituto Universitario de Física Aplicada a las Ciencias y las Tecnologías |
Palabras clave: | Asteroid dynamics | Asteroids | Asteroid satellites |
Fecha de publicación: | 14-jul-2022 |
Editor: | IOP Publishing | American Astronomical Society |
Cita bibliográfica: | The Planetary Science Journal. 2022, 3:157. https://doi.org/10.3847/PSJ/ac76c9 |
Resumen: | NASA's Double Asteroid Redirection Test (DART) spacecraft is planned to impact the natural satellite of (65803) Didymos, Dimorphos, at around 23:14 UTC on 2022 September 26, causing a reduction in its orbital period that will be measurable with ground-based observations. This test of kinetic impactor technology will provide the first estimate of the momentum transfer enhancement factor β at a realistic scale, wherein the ejecta from the impact provide an additional deflection to the target. Earth-based observations, the LICIACube spacecraft (to be detached from DART prior to impact), and ESA's follow-up Hera mission, to launch in 2024, will provide additional characterizations of the deflection test. Together, Hera and DART comprise the Asteroid Impact and Deflection Assessment cooperation between NASA and ESA. Here, the predicted dynamical states of the binary system upon arrival and after impact are presented. The assumed dynamically relaxed state of the system will be excited by the impact, leading to an increase in eccentricity and a slight tilt of the orbit, together with enhanced libration of Dimorphos, with the amplitude dependent on the currently poorly known target shape. Free rotation around the moon's long axis may also be triggered, and the orbital period will experience variations from seconds to minutes over timescales of days to months. Shape change of either body, due to cratering or mass wasting triggered by crater formation and ejecta, may affect β, but can be constrained through additional measurements. Both BYORP and gravity tides may cause measurable orbital changes on the timescale of Hera's rendezvous. |
Patrocinador/es: | This work was supported in part by the DART mission, NASA Contract #80MSFC20D0004 to JHU/APL. F.F. acknowledges funding from the Swiss National Science Foundation (SNSF) Ambizione grant No. 193346. O.K., A.C.B., I.G., M.J., P.M., S.D.R., K.T., and Y.Z. acknowledge funding support from the European Union's Horizon 2020 research and innovation program under grant agreement No. 870377 (project NEO-MAPP). J.W.M. acknowledges support from the DART Participating Scientist Program (#80NSSC21K1048). S.R.S. acknowledges support from the DART Participating Scientist Program (#80NSSC22K0318). A.C.B. acknowledges funding from the Spanish MICINN RTI2018-099464-B-I00. E.D. and A.R. acknowledge financial support from Agenzia Spaziale Italiana (ASI, contract No. 2019-31-HH.0 CUP F84I190012600). E.G.F. acknowledges that some of this work was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA (#80NM0018D0004). P.M. acknowledges support from the French space agency CNES. R.N. acknowledges support from NASA/FINESST (NNH20ZDA001N). |
URI: | http://hdl.handle.net/10045/125569 |
ISSN: | 2632-3338 |
DOI: | 10.3847/PSJ/ac76c9 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.3847/PSJ/ac76c9 |
Aparece en las colecciones: | INV - Astronomía y Astrofísica - Artículos de Revistas Investigaciones financiadas por la UE |
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