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Radar observations of asteroid 1986 JK (1989)

Chodas, P. W. ; Yeomans, D. K. ; Ostro, S. J. ; [et al.]

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Publication Date: 2011-08-19

Description: The asteroid 1986 JK was observed with a 3.5 cm-wavelength radar in May and June, 1986, at less than 0.029 AU; its radar echo power circular polarization ratio indicates single backscattering from smooth surface elements. A working model constructed for the asteroid in light of these radar data postulates a 1-2 km object whose shape has little elongation and some polar flattening. Orbital and physical characteristics are rather cometlike. The radar astrometric data obtained are noted to be extremely powerful for orbit-improvement, so that a search ephemeris whose uncertainty is an order-of-magnitude smaller than that based on relevant optical data alone can be prepared by combining optical and radar data.

Keywords: ASTRONOMY

Type: Icarus (ISSN 0019-1035); 78; 382-394

Format: text

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