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The Perturbed Full Two-body Problem: Application to Post-DART Didymos

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    0574937 - ASÚ 2024 RIV US eng J - Článek v odborném periodiku
    Meyer, A. J. - Agrusa, H. F. - Richardson, D.C. - Pravec, Petr - Scheirich, Peter … celkem 22 autorů
    The Perturbed Full Two-body Problem: Application to Post-DART Didymos.
    The Planetary Science Journal. Roč. 4, č. 8 (2023), č. článku 141. E-ISSN 2632-3338
    Grant CEP: GA ČR(CZ) GA20-04431S
    Institucionální podpora: RVO:67985815
    Klíčová slova: asteroid dynamics * asteroid satellites * near-Earth objects
    Obor OECD: Astronomy (including astrophysics,space science)
    Impakt faktor: 3.4, rok: 2022
    Způsob publikování: Open access

    With the successful impact of the NASA Double Asteroid Redirection Test (DART) spacecraft in the Didymos-Dimorphos binary asteroid system, we provide an initial analysis of the post-impact perturbed binary asteroid dynamics. To compare our simulation results with observations, we introduce a set of “observable elements” calculated using only the physical separation of the binary asteroid, rather than traditional Keplerian elements. Using numerical methods that treat the fully spin-orbit-coupled dynamics, we estimate the system's mass and the impact-induced changes in orbital velocity, semimajor axis, and eccentricity. We find that the changes to the mutual orbit depend strongly on the separation distance between Didymos and Dimorphos at the time of impact. If Dimorphos enters a tumbling state after the impact, this may be observable through changes in the system's eccentricity and orbit period. We also find that any DART-induced reshaping of Dimorphos would generally reduce the required change in orbital velocity to achieve the measured post-impact orbit period, and will be assessed by the ESA Hera mission in 2027.
    Trvalý link: https://hdl.handle.net/11104/0345207

     
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