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Trajectory and physical properties of near-Earth asteroid 2009 BD

Chesley, S. and Mommert, M. and Hora, J.L. and Farnocchia, D. and Trilling, D.E. and Vokrouhlicky, D. and Mueller, M. and Harris, A.W. and Smith, H.A. and Fazio, G. (2014) Trajectory and physical properties of near-Earth asteroid 2009 BD. American Astronomical Society, DDA meeting #45, 28. Apr. - 01. Mai 2014, Philadelphia, Pennsylvania, USA.

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We analyze the trajectory of near-Earth asteroid 2009 BD, which is a candidate target of the NASA Asteroid Robotic Retrieval Mission (ARRM). The small size of 2009 BD and its Earth-like orbit pose challenges to understanding the dynamical properties of 2009 BD. In particular, nongravitational perturbations, such as solar radiation pressure and the Yarkovsky effect, are essential to match observational data and provide reliable predictions. By using Spitzer Space Telescope IRAC observations and our estimates of the nongravitational forces acting on 2009 BD we obtain probabilistic derivations of the physical properties of this object. We find two physically possible solutions. The first solution shows 2009 BD as a 2.9±0.3 m diameter rocky body with an extremely high albedo that is covered with regolith-like material, causing it to exhibit a low thermal inertia. The second solution suggests 2009 BD to be a 4±1 m diameter asteroid with albedo 0.45±0.35 that consists of a collection of individual bare rock slabs. We are unable to rule out either solution based on physical reasoning. 2009 BD is among the smallest asteroids for which physical properties have been constrained, providing unique information on the physical properties of objects in the size range smaller than 10 m.

Item URL in elib:https://elib.dlr.de/93410/
Document Type:Conference or Workshop Item (Speech)
Title:Trajectory and physical properties of near-Earth asteroid 2009 BD
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Chesley, S.Jet Propulsion Laboratory, California Institute of Technology, USAUNSPECIFIEDUNSPECIFIED
Mommert, M.Northern Arizona University, PO Box 6010, Flagstaff, AZ 86011, USAUNSPECIFIEDUNSPECIFIED
Hora, J.L.Harvard-Smithsonian Center for Astrophysics, USAUNSPECIFIEDUNSPECIFIED
Farnocchia, D.JPL, Caltech, Pasadena, CA 91109, USAUNSPECIFIEDUNSPECIFIED
Trilling, D.E.Northern Arizona University, USAUNSPECIFIEDUNSPECIFIED
Vokrouhlicky, D.Charles University, CZ-18000, Prague 8, Czech RepublicUNSPECIFIEDUNSPECIFIED
Smith, H.A.Harvard-Smithsonian Center for Astrophysics, USAUNSPECIFIEDUNSPECIFIED
Fazio, G.Harvard-Smithsonian Center for Astrophysics, USAUNSPECIFIEDUNSPECIFIED
Date:May 2014
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Asteroids, near-Earth asteroids, Yarkovsky effect, Spitzer Space Telescope
Event Title:American Astronomical Society, DDA meeting #45
Event Location:Philadelphia, Pennsylvania, USA
Event Type:international Conference
Event Dates:28. Apr. - 01. Mai 2014
Organizer:American Astronomical Society
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Exploration of the Solar System
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Leitungsbereich PF
Deposited By: Harris, Prof. Alan
Deposited On:15 Dec 2014 10:20
Last Modified:15 Dec 2014 10:20

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