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Bulk Densities of Binary Asteroids from the Warm Spitzer NEO Survey

Kistler, J. and Trilling, D.E. and Mueller, M. and Hora, J.L. and Harris, A.W. and Bhattacharya, B. and Bottke, W.F. and Chesley, S. and Emery, J.P. and Fazio, G. and Mainzer, A. and Penprase, B. and Smith, H.A. and Spahr, T.B. and Stansberry, J.A. and Thomas, C.A. (2010) Bulk Densities of Binary Asteroids from the Warm Spitzer NEO Survey. In: Bulletin of the American Astronomical Society, 42 (4), p. 1082. American Astronomical Society. American Astronomical Society Division for Planetary Sciences meeting #42, 3-8 Oct 2010, Pasadena, USA. ISSN 0002-7537

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Official URL: http://www.abstractsonline.com/plan/ViewAbstract.aspx?mID=2704&sKey=8102c03d-20b1-47e2-951c-335d761edbf4&cKey=cb258bdb-2fe0-44d2-8ae2-9ffc46f956a8&mKey={D515DFC0-245C-4047-81CC-C221DC1A54C6}

Abstract

The Warm Spitzer NEO survey, ExploreNEOs, will observe approximately 700 Near Earth Asteroids. Several of these objects are known to be binary asteroid systems. Binary systems are interesting due to the unique opportunity they present for determining the masses and densities of their constituent bodies. The calculations rely on a variety of data sources. The geometric albedo and effective diameter of the system are known via ExploreNEOs. Ground based light curve observations can give the orbital period and the secondary to primary diameter ratio of the system. In some cases, Arecibo radar observations provide the semi-major axis of the system. We report here the bulk density of one of these binaries in particular, asteroid 1999DJ4. The density derived is 1.6 g/cm3. For those cases where radar data is unavailable, we address the effectiveness and difficulties of using transit timing of a binary asteroid to determine the semi-major axis of the system. We discuss the viability of finding a bulk density based solely on Warm Spitzer observations and ground based light curve data.

Document Type:Conference or Workshop Item (Paper)
Title:Bulk Densities of Binary Asteroids from the Warm Spitzer NEO Survey
Authors:
AuthorsInstitution or Email of Authors
Kistler, J.Northern Arizona university, USA
Trilling, D.E.Northern Arizona University, USA
Mueller, M.Universite de Nice Sophia Antipolis, France
Hora, J.L.Harvard-Smithsonian Center for Astrophysics, USA
Harris, A.W.alan.harris@dlr.de
Bhattacharya, B.NASA Herschel Science Center Caltech, USA
Bottke, W.F.Southwest Research Institute, USA
Chesley, S.Jet Propulsion Laboratory, California Institute of Technology, USA
Emery, J.P.Department of Earth and Planetary Sciences, University of Tennessee, USA
Fazio, G.Harvard-Smithsonian Center for Astrophysics, USA
Mainzer, A.Jet Propulsion Laboratory, California Institute of Technology, USA
Penprase, B.Department of Physics and Astronomy, Pomona College, USA
Smith, H.A.Harvard-Smithsonian Center for Astrophysics, USA
Spahr, T.B.Harvard-Smithsonian Center for Astrophysics, USA
Stansberry, J.A.Steward Observatory, University of Arizona, USA
Thomas, C.A.Northern Arizona University, USA
Date:October 2010
Journal or Publication Title:Bulletin of the American Astronomical Society
Volume:42
Page Range:p. 1082
Editors:
EditorsEmail
Marvel, K.B.UNSPECIFIED
Publisher:American Astronomical Society
ISSN:0002-7537
Status:Published
Keywords:Near-Earth objects, Spitzer Space telescope, Binary asteroids
Event Title:American Astronomical Society Division for Planetary Sciences meeting #42
Event Location:Pasadena, USA
Event Type:international Conference
Event Dates:3-8 Oct 2010
Organizer:American Astronomical Society
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: Prof. Alan Harris
Deposited On:03 Jan 2011 20:29
Last Modified:03 Jan 2011 20:29

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