Modelling asteroid brightness variations. II - The interpretability of light curves and phase curves

Details Modelling asteroid brightness variations. II - The interpretability of light curves and phase curves Modelling asteroid brightness variations. II - The interpretability of light curves and phase curves

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...208..320k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 208, no. 1-2, Jan. 1989, p. 320-326. Research supported by the Herman Rosenber

Astronomy and Astrophysics

Astronomy

12

Albedo, Asteroids, Astronomical Models, Brightness Distribution, Light Curve, Ellipsoids, Light Scattering, Surface Roughness, Asteroids, Models, Brightness, Lightcurves, Scattering, Parameters, Amplitude, Shape, Theoretical Studies, Astronomy, Albedo, Craters, Surface, Features

Scientific paper

Light curves and phase curves have been computed for various asteroid models using the Lumme-Bowell (1981) scattering law. The effects of the scattering parameters on light curves were found to be almost negligible for homogeneous surfaces. The effects on phase curves were more distinct, but changing any of the scattering parameters affects the phase curves in a very similar way, making it impossible to find a unique set of parameter values corresponding to a given phase curve. Light curve amplitudes, on the other hand, depend very strongly on body shape. At least in the case of a triaxial ellipsoid it is possible to determine the axial ratios. Some observed irregularities of light curves can also be modelled easily, but the uniqueness of such models is far from obvious.

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