An analysis of the amplitude-phase relationship among asteroids

Details An analysis of the amplitude-phase relationship among asteroids An analysis of the amplitude-phase relationship among asteroids

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...231..548z&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 231, no. 2, May 1990, p. 548-560. Research supported by CNR and MPI.

Astronomy and Astrophysics

Astronomy

78

Asteroids, Astronomical Models, Astronomical Photometry, Light Curve, Amplitudes, Computerized Simulation, Phase Shift, Asteroids, Amplitude, Astronomy, Lightcurve, Phase Angles, Models, Data, Numerical Methods, Classification, Laboratory Studies, Optical Properties, Photometry, Comparisons, Parameters, Geometry, Physical Properties, Size, Shape, Procedure, Opacity, Particles, Scattering, Hypotheses

Scientific paper

Analysis of the relationship existing between lightcurve amplitudes and phase angles for a set of numerical and laboratory models is presented. As a first approximation, both approaches give evidences of linear relationships. Moreover, the slopes of these relationships appear to depend linearly on the corresponding amplitudes reduced to 0 deg phase angle. This fact offers a simple method for reducing observed amplitudes to the same phase angle, as strongly necessary when determinations of shapes and poles are attempted. In addition, the available amplitude-phase relationships of actual asteroids are analyzed. They qualitatively confirm the numerical and laboratory results and give indication of different behaviors among different taxonomic types. In particular, C, M and E types show quite similar, small slopes, while S-type objects are characterized by a large sloper.

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