Physics – Geophysics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept...90o&link_type=abstract
In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 90-91 (SEE N87-23341 16-91)
Physics
Geophysics
Asteroids, Geometry, Inversions, Light Curve, Shapes, Albedo, Concavity, Light Scattering
Scientific paper
One of the most fundamental physical properties of any asteroid is its shape. Lightcurves provide the only source of shape information for most asteroids. Unfortunately, the functional form of a lightcurve is determined by the viewing/illumination geometry and the asteroid's light scattering characteristics as well as its shape, and in general it is impossible to determine an asteroid's shape from lightcurves. A technique called convex-profile inversion (CPI) that obtains a convex profile, P, from any lightcurve is introduced. If certain ideal conditions are satisfied, then P is an estimator for the asteroid's mean cross section, C, a convex set defined as the average of all cross sections C(z) cut by planes a distance z above the asteroids's equatorial plane. C is therefore a 2-D average of the asteroid's 3-D shape.
Connelly Robert
Ostro Steven J.
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