Volume 397, Number 1, January I 2003
|Page(s)||325 - 328|
|Section||Planets and planetary systems|
|Published online||11 December 2002|
Thermal observations of MUSES-C mission target (25143) 1998 SF *
National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Japan e-mail: firstname.lastname@example.org
2 European Southern Observatory (ESO), Alonso de Cordova 3107, Vitacura, Santiago, Chile e-mail: email@example.com, firstname.lastname@example.org
3 Institute of Space and Astronautical Science (ISAS), 3-1-1 Yoshinodai, Sagamihara, Kanagawa, Japan e-mail: email@example.com; firstname.lastname@example.org
4 School of Science, The University of Tokyo, Department of Astronomy, Bunkyo, Tokyo e-mail: email@example.com
Corresponding author: T. Sekiguchi, firstname.lastname@example.org
Accepted: 25 September 2002
We present thermal observations of MUSES-C mission target, (25143) 1998 SF36. The mid-IR radiation in the N-band (11.9 μm) was measured using the ESO 3.6 m telescope with TIMMI2. Assuming the Standard Thermal Model and combining the thermal flux in the N-band with the time-resolved absolute magnitude in optical, the derived diameter and the geometric albedo are 0.35 (±0.03) km and 0.23 (+0.07, -0.05), respectively. While these values are model-dependent, we conclude that this Apollo class asteroid is of small size and its albedo is consistent with spectroscopic classification as an S-type asteroid.
Key words: infrared: solar system / minor planets, asteroids / space vehicles
© ESO, 2003
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