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WISE data and sparse photometry used for shape reconstruction of asteroids

Published online by Cambridge University Press:  01 March 2016

Josef Ďurech ,
Josef Hanuš ,
Victor M. Alí-Lagoa ,
Marco Delbo  and
Dagmara A. Oszkiewicz
Josef Ďurech
Affiliation:
Astronomical Institute, Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, 18000 Prague, Czech Republic email: durech@sirrah.troja.mff.cuni.cz
Josef Hanuš
Affiliation:
Laboratoire Lagrange, UMR7293, Université de la Côte d'Azur, CNRS, Observatoire de la Côte d'Azur, Blvd de l'Observatoire, CS 34229, 06304 Nice cedex 4, France
Victor M. Alí-Lagoa
Affiliation:
Laboratoire Lagrange, UMR7293, Université de la Côte d'Azur, CNRS, Observatoire de la Côte d'Azur, Blvd de l'Observatoire, CS 34229, 06304 Nice cedex 4, France
Marco Delbo
Affiliation:
Laboratoire Lagrange, UMR7293, Université de la Côte d'Azur, CNRS, Observatoire de la Côte d'Azur, Blvd de l'Observatoire, CS 34229, 06304 Nice cedex 4, France
Dagmara A. Oszkiewicz
Affiliation:
Astronomical Observatory Institute, Faculty of Physics, A. Mickiewicz University, Słoneczna 36, 60-286 Poznań, Poland
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Abstract

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Asteroid disk-integrated sparse-in-time photometry can be used for determination of shapes and spin states of asteroids by the lightcurve inversion method. To clearly distinguish the correct solution of the rotation period from other minima in the parameter space, data with good photometric accuracy are needed. We show that if the low-quality sparse photometry obtained from ground-based astrometric surveys is combined with data from the Wide-field Infrared Survey Explorer (WISE) satellite, the correct rotation period can be successfully derived. Although WISE observed in mid-IR wavelengths, we show that for the period and spin determination, these data can be modelled as reflected light. The absolute fluxes are not required since only relative variation of the flux over the rotation is sufficient to determine the period. We also discuss the potential of combining all WISE data with the Lowell photometric database to create physical models of thousands of asteroids.

Keywords

methods: data analysistechniques: photometricminor planetsasteroidsinfrared: solar system
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S318: Asteroids: New Observations, New Models , August 2015 , pp. 170 - 176
Copyright
Copyright © International Astronomical Union 2016 

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