Macro-scale roughness reveals the complex history of asteroids Didymos and Dimorphos
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916265858170880 |
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| author | Vincent, Jean-Baptiste Asphaug, Erik Barnouin, Olivier Beccarelli, Joel Benavidez, Paula G. Campo-Bagatin, Adriano Chabot, Nancy L. Ernst, Carolyn M. Hasselmann, Pedro H. Hirabayashi, Masatoshi Ieva, Simone Karatekin, Ozgur Kasparek, Tomas Kohout, Tomas Lin, Zhong-Yi Lucchetti, Alice Michel, Patrick Murdoch, Naomi Pajola, Maurizio Parro, Laura M. Raducan, Sabina D. Sunshine, Jessica Tancredi, Gonzalo Trigo-Rodriguez, Josep M. Zinzi, Angelo |
| author_facet | Vincent, Jean-Baptiste Asphaug, Erik Barnouin, Olivier Beccarelli, Joel Benavidez, Paula G. Campo-Bagatin, Adriano Chabot, Nancy L. Ernst, Carolyn M. Hasselmann, Pedro H. Hirabayashi, Masatoshi Ieva, Simone Karatekin, Ozgur Kasparek, Tomas Kohout, Tomas Lin, Zhong-Yi Lucchetti, Alice Michel, Patrick Murdoch, Naomi Pajola, Maurizio Parro, Laura M. Raducan, Sabina D. Sunshine, Jessica Tancredi, Gonzalo Trigo-Rodriguez, Josep M. Zinzi, Angelo |
| contents | Morphological mapping is a fundamental step in studying the processes that shaped an asteroid surface. Yet, it is challenging and often requires multiple independent assessments by trained experts. Here, we present fast methods to detect and characterize meaningful terrains from the topographic roughness: entropy of information, and local mean surface orientation. We apply our techniques to Didymos and Dimorphos, the target asteroids of NASA's DART mission: first attempt to deflect an asteroid. Our methods reliably identify morphological units at multiple scales. The comparative study reveals various terrain types, signatures of processes that transformed Didymos and Dimorphos. Didymos shows the most heterogeneity and morphology that indicate recent resurfacing events. Dimorphos is comparatively rougher than Didymos, which may result from the formation process of the binary pair and past interaction between the two bodies. Our methods can be readily applied to other bodies and data sets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_19764 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Macro-scale roughness reveals the complex history of asteroids Didymos and Dimorphos Vincent, Jean-Baptiste Asphaug, Erik Barnouin, Olivier Beccarelli, Joel Benavidez, Paula G. Campo-Bagatin, Adriano Chabot, Nancy L. Ernst, Carolyn M. Hasselmann, Pedro H. Hirabayashi, Masatoshi Ieva, Simone Karatekin, Ozgur Kasparek, Tomas Kohout, Tomas Lin, Zhong-Yi Lucchetti, Alice Michel, Patrick Murdoch, Naomi Pajola, Maurizio Parro, Laura M. Raducan, Sabina D. Sunshine, Jessica Tancredi, Gonzalo Trigo-Rodriguez, Josep M. Zinzi, Angelo Earth and Planetary Astrophysics Morphological mapping is a fundamental step in studying the processes that shaped an asteroid surface. Yet, it is challenging and often requires multiple independent assessments by trained experts. Here, we present fast methods to detect and characterize meaningful terrains from the topographic roughness: entropy of information, and local mean surface orientation. We apply our techniques to Didymos and Dimorphos, the target asteroids of NASA's DART mission: first attempt to deflect an asteroid. Our methods reliably identify morphological units at multiple scales. The comparative study reveals various terrain types, signatures of processes that transformed Didymos and Dimorphos. Didymos shows the most heterogeneity and morphology that indicate recent resurfacing events. Dimorphos is comparatively rougher than Didymos, which may result from the formation process of the binary pair and past interaction between the two bodies. Our methods can be readily applied to other bodies and data sets. |
| title | Macro-scale roughness reveals the complex history of asteroids Didymos and Dimorphos |
| topic | Earth and Planetary Astrophysics |
| url | https://arxiv.org/abs/2405.19764 |