Polarimetric observations of (6) Hebe

Details Polarimetric observations of (6) Hebe Polarimetric observations of (6) Hebe

May 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994icar..109..204b&link_type=abstract

Icarus (ISSN 0019-1035), vol. 109, no. 1, p. 204-209

Astronomy and Astrophysics

Astronomy

8

Asteroids, Linear Polarization, Surface Properties, Albedo, Astronomical Polarimetry, Chondrites, Phase Shift, Ubv Spectra

Scientific paper

The S-type, 200-km-sized asteroid (6) Hebe has been recently indicated as a potential parent body of the ordinary chondrite meteorites. We report polarimetric observations of Hebe, which show a 0.17% variation of the degree of linear polarization p over a rotational cycle, and a small variation of the position angle theta of the polarization plane with a frequency of twice the rotation rate. These results indicate that Hebe's surface is optically heterogeneous, probably as a consequence of albedo and/or texture changes. Rotationally resolved spectroscopic observations are needed to assess whether the surface is also compositionally heterogeneous. This would rule it out as a possible source of undifferentiated meteorites, such as the ordinary chondrites.

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