Anticipated Geological Assessment of the (65803) Didymos–Dimorphos System, Target of the DART–LICIACube Mission

M. Pajola,O. S. Barnouin,A. Lucchetti,M. Hirabayashi,R.-L. Ballouz,E. Asphaug,C. M. Ernst,V. Della Corte,T. Farnham,G. Poggiali,J. M. Sunshine,E. Mazzotta Epifani,N. Murdoch,S. Ieva,S. R. Schwartz, S. Ivanovski,J. M. Trigo-Rodriguez,A. Rossi,N. L. Chabot, A. Zinzi,A. Rivkin,J. R. Brucato,P. Michel,G. Cremonese, E. Dotto, M. Amoroso, I. Bertini,A. Capannolo, A. Cheng, B. Cotugno,M. Dall’Ora,R. T. Daly,V. Di Tana, J. D. P. Deshapriya,I. Gai,P. H. A. Hasselmann,G. Impresario,M. Lavagna,A. Meneghin, F. Miglioretti,D. Modenini,P. Palumbo, D. Perna, S. Pirrotta,E. Simioni, S. Simonetti,P. Tortora,M. Zannoni,G. Zanotti

The Planetary Science Journal（2022）

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摘要

Abstract On 2022 September 26, the DART spacecraft will impact the surface of Dimorphos, the ∼160 m size satellite of the binary near-Earth asteroid (NEA) (65803) Didymos. What will be observed on the surfaces of both asteroids and at the DART impact site is largely unknown, beyond the details of Didymos revealed by previous Arecibo and Goldstone radar observations. We present here the expected DART and LICIACube observations of the Didymos system and discuss the planned mapping strategies. By searching similar geological features and processes identified on other NEAs, we constrain the impact conditions that DART might encounter at Dimorphos, assessing both the asteroid’s surface and interior structure.

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关键词

didymos–dimorphos system,geological assessment

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