Author/Authors :
Cellino، نويسنده , , Alberto and Yoshida، نويسنده , , Fumi and Anderlucci، نويسنده , , E. and Bendjoya، نويسنده , , Philippe and Di Martino، نويسنده , , Mario and Ishiguro، نويسنده , , Masateru and Nakamura، نويسنده , , Akiko M. and Saito، نويسنده , , Jun، نويسنده ,
Abstract :
The near-Earth Asteroid 25143 Itokawa, the target of the Japanese space mission Hayabusa, was observed in June, 2004 with the Torino photopolarimeter attached at the 2.15 m telescope of the El Leoncito Observatory (Argentina). The degree of linear polarization in five colors was measured over a wide range of phase angles, between 40° and 80°. The data obtained are sufficient to derive an estimate of the asteroidʹs albedo of 0.24 ± 0.01 , which is in good agreement with the S-type taxonomic classification of this object. The phase-polarization curve has been sampled in UBVRI colors, covering a wide range of phase angles that cannot be reached by Earth-based observations of Main Belt asteroids.
