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An artificial impact on the asteroid (162173) Ryugu formed a crater in the gravity-dominated regime.

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Title: An artificial impact on the asteroid (162173) Ryugu formed a crater in the gravity-dominated regime.
Authors: Arakawa, M., Saiki, T., Wada, K., Ogawa, K., Kadono, T., Shirai, K., Sawada, H., Ishibashi, K., Honda, R., Sakatani, N., Iijima, Y., Okamoto, C., Yano, H., Takagi, Y., Hayakawa, M., Michel, P., Jutzi, M., Shimaki, Y., Kimura, S., Mimasu, Y.
Source: Science (pre-March 2025). 4/3/2020, Vol. 367 Issue 6486, p67-71. 5p. 1 Color Photograph, 2 Black and White Photographs, 1 Graph.
Subjects: Asteroids, Sedimentation & deposition, Gravity, Scaling laws (Nuclear physics), Velocity distribution (Statistical mechanics)
Abstract: The Hayabusa2 spacecraft investigated the small asteroid Ryugu, which has a rubble-pile structure. We describe an impact experiment on Ryugu using Hayabusa2's Small Carry-on Impactor. The impact produced an artificial crater with a diameter >10 meters, which has a semicircular shape, an elevated rim, and a central pit. Images of the impact and resulting ejecta were recorded by the Deployable CAMera 3 for >8 minutes, showing the growth of an ejecta curtain (the outer edge of the ejecta) and deposition of ejecta onto the surface. The ejecta curtain was asymmetric and heterogeneous and it never fully detached from the surface. The crater formed in the gravity-dominated regime; in other words, crater growth was limited by gravity not surface strength. We discuss implications for Ryugu's surface age. [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: An artificial impact on the asteroid (162173) Ryugu formed a crater in the gravity-dominated regime.
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  Data: <searchLink fieldCode="AR" term="%22Arakawa%2C+M%2E%22">Arakawa, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Saiki%2C+T%2E%22">Saiki, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Wada%2C+K%2E%22">Wada, K.</searchLink><br /><searchLink fieldCode="AR" term="%22Ogawa%2C+K%2E%22">Ogawa, K.</searchLink><br /><searchLink fieldCode="AR" term="%22Kadono%2C+T%2E%22">Kadono, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Shirai%2C+K%2E%22">Shirai, K.</searchLink><br /><searchLink fieldCode="AR" term="%22Sawada%2C+H%2E%22">Sawada, H.</searchLink><br /><searchLink fieldCode="AR" term="%22Ishibashi%2C+K%2E%22">Ishibashi, K.</searchLink><br /><searchLink fieldCode="AR" term="%22Honda%2C+R%2E%22">Honda, R.</searchLink><br /><searchLink fieldCode="AR" term="%22Sakatani%2C+N%2E%22">Sakatani, N.</searchLink><br /><searchLink fieldCode="AR" term="%22Iijima%2C+Y%2E%22">Iijima, Y.</searchLink><br /><searchLink fieldCode="AR" term="%22Okamoto%2C+C%2E%22">Okamoto, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Yano%2C+H%2E%22">Yano, H.</searchLink><br /><searchLink fieldCode="AR" term="%22Takagi%2C+Y%2E%22">Takagi, Y.</searchLink><br /><searchLink fieldCode="AR" term="%22Hayakawa%2C+M%2E%22">Hayakawa, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Michel%2C+P%2E%22">Michel, P.</searchLink><br /><searchLink fieldCode="AR" term="%22Jutzi%2C+M%2E%22">Jutzi, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Shimaki%2C+Y%2E%22">Shimaki, Y.</searchLink><br /><searchLink fieldCode="AR" term="%22Kimura%2C+S%2E%22">Kimura, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Mimasu%2C+Y%2E%22">Mimasu, Y.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 4/3/2020, Vol. 367 Issue 6486, p67-71. 5p. 1 Color Photograph, 2 Black and White Photographs, 1 Graph.
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  Data: <searchLink fieldCode="DE" term="%22Asteroids%22">Asteroids</searchLink><br /><searchLink fieldCode="DE" term="%22Sedimentation+%26+deposition%22">Sedimentation & deposition</searchLink><br /><searchLink fieldCode="DE" term="%22Gravity%22">Gravity</searchLink><br /><searchLink fieldCode="DE" term="%22Scaling+laws+%28Nuclear+physics%29%22">Scaling laws (Nuclear physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Velocity+distribution+%28Statistical+mechanics%29%22">Velocity distribution (Statistical mechanics)</searchLink>
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  Label: Abstract
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  Data: The Hayabusa2 spacecraft investigated the small asteroid Ryugu, which has a rubble-pile structure. We describe an impact experiment on Ryugu using Hayabusa2's Small Carry-on Impactor. The impact produced an artificial crater with a diameter >10 meters, which has a semicircular shape, an elevated rim, and a central pit. Images of the impact and resulting ejecta were recorded by the Deployable CAMera 3 for >8 minutes, showing the growth of an ejecta curtain (the outer edge of the ejecta) and deposition of ejecta onto the surface. The ejecta curtain was asymmetric and heterogeneous and it never fully detached from the surface. The crater formed in the gravity-dominated regime; in other words, crater growth was limited by gravity not surface strength. We discuss implications for Ryugu's surface age. [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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=142591634
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