Asteroid photometric and polarimetric phase curves: empirical interpretation |
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Authors: | S Kaasalainen M Kaasalainen K Muinonen A Cellino |
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Institution: | a Observatory, P.O. Box 14, 00014 University of Helsinki, Helsinki, Finland b Jet Propulsion Laboratory, Pasadena, CA 91109, USA c Astronomical Observatory of Torino, via Osservatorio 20, I-10025 Pino Torinese, Italy |
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Abstract: | A method for interpretation of asteroid phase curves, based on empirical modeling and laboratory measurements, is outlined and preliminary results are presented. A linear-exponential function is used to describe the opposition peaks and negative polarization surges of various asteroids and laboratory samples and a statistical algorithm is used in parameter estimation. The linear-exponential function describes well the phase curves, but dense phase angle coverage, particularly at small phase angles must be obtained to improve the results. Major emphasis should also be put on laboratory study: with an extensive library of laboratory measurements, a stronger connection between the phase curve properties and surface characteristics is possible. |
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Keywords: | Asteroids Meteorites Photometry Polarimetry |
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