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The Violent Collisional History of Asteroid 4 Vesta.

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Title: The Violent Collisional History of Asteroid 4 Vesta.
Authors: Marchi, S., McSween, H. Y., O'Brien, D. P., Schenk, P., De Sanctis, M. C., Gaskell, R., Jaumann, R., Mottola, S., Preusker, F., Raymond, C. A., Roatsch, T., Russell, C. T.
Source: Science (pre-March 2025). 5/11/2012, Vol. 336 Issue 6082, p690-694. 5p.
Subjects: Astrogeology, Astronomical research, Space vehicles, Impact craters, Vesta (Asteroid), Asteroid belt
Abstract: Vesta is a large differentiated rocky body in the main asteroid belt that accreted within the first few million years after the formation of the earliest solar system solids. The Dawn spacecraft extensively imaged Vesta's surface, revealing a collision-dominated history. Results show that Vesta's cratering record has a strong north-south dichotomy. Vesta's northern heavily cratered terrains retain much of their earliest history. The southern hemisphere was reset, however, by two major collisions in more recent times. We estimate that the youngest of these impact structures, about 500 kilometers across, formed about 1 billion years ago, in agreement with estimates of Vesta asteroid family age based on dynamical and collisional constraints, supporting the notion that the Vesta asteroid family was formed during this event. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: The Violent Collisional History of Asteroid 4 Vesta.
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  Data: <searchLink fieldCode="AR" term="%22Marchi%2C+S%2E%22">Marchi, S.</searchLink><br /><searchLink fieldCode="AR" term="%22McSween%2C+H%2E+Y%2E%22">McSween, H. Y.</searchLink><br /><searchLink fieldCode="AR" term="%22O'Brien%2C+D%2E+P%2E%22">O'Brien, D. P.</searchLink><br /><searchLink fieldCode="AR" term="%22Schenk%2C+P%2E%22">Schenk, P.</searchLink><br /><searchLink fieldCode="AR" term="%22De+Sanctis%2C+M%2E+C%2E%22">De Sanctis, M. C.</searchLink><br /><searchLink fieldCode="AR" term="%22Gaskell%2C+R%2E%22">Gaskell, R.</searchLink><br /><searchLink fieldCode="AR" term="%22Jaumann%2C+R%2E%22">Jaumann, R.</searchLink><br /><searchLink fieldCode="AR" term="%22Mottola%2C+S%2E%22">Mottola, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Preusker%2C+F%2E%22">Preusker, F.</searchLink><br /><searchLink fieldCode="AR" term="%22Raymond%2C+C%2E+A%2E%22">Raymond, C. A.</searchLink><br /><searchLink fieldCode="AR" term="%22Roatsch%2C+T%2E%22">Roatsch, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Russell%2C+C%2E+T%2E%22">Russell, C. T.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 5/11/2012, Vol. 336 Issue 6082, p690-694. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Astrogeology%22">Astrogeology</searchLink><br /><searchLink fieldCode="DE" term="%22Astronomical+research%22">Astronomical research</searchLink><br /><searchLink fieldCode="DE" term="%22Space+vehicles%22">Space vehicles</searchLink><br /><searchLink fieldCode="DE" term="%22Impact+craters%22">Impact craters</searchLink><br /><searchLink fieldCode="DE" term="%22Vesta+%28Asteroid%29%22">Vesta (Asteroid)</searchLink><br /><searchLink fieldCode="DE" term="%22Asteroid+belt%22">Asteroid belt</searchLink>
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  Data: Vesta is a large differentiated rocky body in the main asteroid belt that accreted within the first few million years after the formation of the earliest solar system solids. The Dawn spacecraft extensively imaged Vesta's surface, revealing a collision-dominated history. Results show that Vesta's cratering record has a strong north-south dichotomy. Vesta's northern heavily cratered terrains retain much of their earliest history. The southern hemisphere was reset, however, by two major collisions in more recent times. We estimate that the youngest of these impact structures, about 500 kilometers across, formed about 1 billion years ago, in agreement with estimates of Vesta asteroid family age based on dynamical and collisional constraints, supporting the notion that the Vesta asteroid family was formed during this event. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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