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Delbo, Marco and Dell'Oro, A. and Harris, Alan W. and Mottola, Stefano and Mueller, Michael (2005) The thermal inertia of near-Earth asteroids: Implications for their surface structure and the Yarkovsky effect. IAU Symposium No 229; ACM 2005, 2005-08-07 - 2005-08-12, Buzios, RJ (Brasilien). (Unpublished)
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Abstract
We have used a new method to analyze the largest available database of thermal- infrared observations of near-Earth asteroids (NEAs) in order to constrain their thermal inertia. We have obtained a best fit value of 500+/-100 J m-2 s-0.5 K-1, or about 10 times that of the lunar soil. Our estimate is significantly larger than the value commonly used in the Yarkovsky model of the origin of NEAs. The value of the thermal inertia is one of the major sources of uncertainty in the collision probability prediction of potentially hazardous NEAs, such as 1950 DA. The value of thermal inertia that we have derived is incompatible with surfaces dominated by bare rock for these bodies.
| Item URL in elib: | https://elib.dlr.de/21990/ | ||||||||||||||||||||||||
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| Document Type: | Conference or Workshop Item (Speech) | ||||||||||||||||||||||||
| Title: | The thermal inertia of near-Earth asteroids: Implications for their surface structure and the Yarkovsky effect | ||||||||||||||||||||||||
| Authors: |
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| Date: | August 2005 | ||||||||||||||||||||||||
| Open Access: | No | ||||||||||||||||||||||||
| Gold Open Access: | No | ||||||||||||||||||||||||
| In SCOPUS: | No | ||||||||||||||||||||||||
| In ISI Web of Science: | No | ||||||||||||||||||||||||
| Status: | Unpublished | ||||||||||||||||||||||||
| Keywords: | asteroids | ||||||||||||||||||||||||
| Event Title: | IAU Symposium No 229; ACM 2005 | ||||||||||||||||||||||||
| Event Location: | Buzios, RJ (Brasilien) | ||||||||||||||||||||||||
| Event Type: | international Conference | ||||||||||||||||||||||||
| Event Start Date: | 7 August 2005 | ||||||||||||||||||||||||
| Event End Date: | 12 August 2005 | ||||||||||||||||||||||||
| HGF - Research field: | Aeronautics, Space and Transport (old) | ||||||||||||||||||||||||
| HGF - Program: | Space (old) | ||||||||||||||||||||||||
| HGF - Program Themes: | W EW - Erforschung des Weltraums | ||||||||||||||||||||||||
| DLR - Research area: | Space | ||||||||||||||||||||||||
| DLR - Program: | W EW - Erforschung des Weltraums | ||||||||||||||||||||||||
| DLR - Research theme (Project): | W - Vorhaben Asteroiden und Kometen (old) | ||||||||||||||||||||||||
| Location: | Berlin-Adlershof | ||||||||||||||||||||||||
| Institutes and Institutions: | Institute of Planetary Research > Asteroids and Comets | ||||||||||||||||||||||||
| Deposited By: | Müller, Michael | ||||||||||||||||||||||||
| Deposited On: | 01 Mar 2006 | ||||||||||||||||||||||||
| Last Modified: | 24 Apr 2024 19:03 |
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