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Дата изменения: Mon Aug 8 20:01:41 2005
Дата индексирования: Sat Dec 22 17:29:08 2007
Кодировка:
Michael Busch, Caltech
Radar and Optical Observations and Physical Modeling of Near-Earth Asteroid 10115 (1992 SK)

This talk discusses modeling of asteroid 1992 SK's physical properties from delay-Doppler images and echo spectra obtained during March, 1999, at Goldstone and optical lightcurves obtained during February - March 1999 at Ondřejov Observatory. The images span only ~15 degrees of sky motion and are not strong, but place up to 20 pixels on the asteroid. The radar tracks are confined to subradar latitudes between 20°-40° but have complete rotational phase coverage. The echo spectra and optical lightcurves span ~80° of sky motion, providing important geometric leverage on the pole direction. The optical lightcurves are essential to accurately estimate the asteroid's shape and spin state. The asteroid's period to be 7.3182±0.0003 hours and its pole direction to be at ecliptic longitude, latitude = (99°±5°,-3°±5°). I use the model to predict salient characteristics of radar images and optical lightcurves obtainable during the asteroid's March 2006 approach.