|
|||||
|
|
A polarimetric study of Asteroid 25143 Itokawa |
|
| Authors: | Alberto Cellino Fumi Yoshida Philippe Bendjoya Masateru Ishiguro Jun Saito |
| Institution: | a INAF, Osservatorio Astronomico di Torino, strada Osservatorio 20, I-10025 Pino Torinese (TO), Italy b National Astronomical Observatory of Japan, Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan c LUAN, Université de Nice Sophia Antipolis, Parc Valrose, 06108 Nice cedex 2, France d Institute of Space and Astronautical Science, JAXA, Yoshinodai 3-1-1, Sagamihara, Kanagawa 229-8510, Japan e Kobe University, 1-1 Rokkodai, Nada-Ku, Kobe 657-8501, Japan |
| 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 asteroid's 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. |
| Keywords: | Asteroids Itokawa Polarimetry |
| 本文献已被 ScienceDirect 等数据库收录！ | |