Physical characterization of low delta-V asteroid (175706) 1996 FG3

Wolters, Stephen D. and Rozitis, Ben and Duddy, Samuel R. and Lowry, S.C. and Green, Simon F. and Snodgrass, Colin and Hainaut, OlivierR. and Weissman, Paul (2011) Physical characterization of low delta-V asteroid (175706) 1996 FG3. Monthly Notices of the Royal Astronomical Society, 418 (2). pp. 1246-1257. ISSN 1365-2966. E-ISSN 1365-2966. (doi:https://doi.org/10.1111/j.1365-2966.2011.19575.x) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Official URL
http://dx.doi.org/10.1111/j.1365-2966.2011.19575.x

Abstract

Asteroid (175706) 1996 FG3 is a binary asteroid and the baseline target for the proposed MarcoPolo-R sample return mission. We present thermal-infrared photometry obtained with the European Southern Observatory (ESO) Very Large Telescope using the VISIR instrument, together with optical photometry obtained with the ESO New Technology Telescope using the EFOSC2 instrument. An absolute visual magnitude HV= 17.833 ± 0.024 and phase parameter G=-0.041 ± 0.005 are derived. The near-Earth asteroid thermal model has been fitted to the measured fluxes to derive a geometric visual albedo ?v= 0.046 p± 0.014, effective diameter at the observed aspect Deff= 1.68 ± 0.25 km and beaming parameter ? = 1.15 for phase angle ?±= 117. The advanced thermophysical model (ATPM) has been fitted to the measured fluxes to derive a more accurate effective diameter Deff= 1.71 ± 0.07km and albedo ?v= 0.044 ± 0.004. Based on the ATPM results, assuming the same albedo for primary and secondary, we derive a primary mean spherical diameter D?= 1.69+0.18 - 0.12km, secondary diameter Ds= 0.51 ± 0.03 km and a secondary orbital semimajor axis a= 2.8+1.7 -0.7km. A low surface thermal inertia ?= 120 ± 50Jm-2s-1/2K-1 was also derived, suggesting a dusty surface and raising questions as to the binary formation mechanism of this asteroid. These physical properties are used to predict a Yarkovsky drift in semimajor axis of -60+31 -45myr-1. © 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS.

Item Type: Article
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Mon. Not. R. Astron. Soc. [Field not mapped to EPrints] AD - Planetary and Space Sciences Research Institute, The Open University, Walton Hall, Milton Keynes MK7 6AA, United Kingdom [Field not mapped to EPrints] AD - Centre for Astrophysics and Planetary Sciences, The University of Kent, Canterbury, Kent CT2 7NZ, United Kingdom [Field not mapped to EPrints] AD - Max-Planck-Institut für Sonnensystemforschung, 37191 Katlenburg-Lindau, Germany [Field not mapped to EPrints] AD - European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748 Garching bei München, Germany [Field not mapped to EPrints] AD - Planetary Ices Section, Jet Propulsion Laboratory, Pasadena, CA 91109, United States [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Uncontrolled keywords: Infrared: general, Minor planets, asteroids: individual: (175706)1996FG3, Radiation mechanisms: thermal
Subjects: Q Science > QB Astronomy
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: Stephen Lowry
Date Deposited: 08 Dec 2015 22:45 UTC
Last Modified: 21 Dec 2015 11:53 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/52283 (The current URI for this page, for reference purposes)
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