| Issue | A&A Volume397, Number1, January I 2003 | |
|---|---|---|
| Page(s) | 325 - 328 | |
| Section | Planets and planetary systems | |
| DOI | https://doi.org/10.1051/0004-6361:20021437 | |
| Published online | 11 December 2002 | |
Thermal observations of MUSES-C mission target (25143) 1998 SF
*
T. Sekiguchi1,2,M. Abe3,H. Boehnhardt2,B. Dermawan4,O. R. Hainaut2 andS. Hasegawa3
1 National Astronomical Observatory, 2-21-1 Osawa, Mitaka, Japan e-mail: t.sekiguchi@nao.ac.jp
2 European Southern Observatory (ESO), Alonso de Cordova 3107, Vitacura, Santiago, Chile e-mail: hboehnha@eso.org, ohainaut@eso.org
3 Institute of Space and Astronautical Science (ISAS), 3-1-1 Yoshinodai, Sagamihara, Kanagawa, Japan e-mail: abe@planeta.sci.isas.ac.jp; hasegawa@planeta.sci.isas.ac.jp
4 School of Science, The University of Tokyo, Department of Astronomy, Bunkyo, Tokyo e-mail: budydr@cc.nao.ac.jp
Corresponding author: T. Sekiguchi, t.sekiguchi@nao.ac.jp
Received: 2 April 2001
Accepted: 25 September 2002
We present thermal observations of MUSES-C mission target, (25143)1998 SF36. The mid-IR radiation in theN-band (11.9μm) wasmeasured using the ESO 3.6 m telescope with TIMMI2.Assuming the Standard Thermal Model and combining the thermal flux in theN-band with the time-resolved absolute magnitude in optical, thederived diameter and the geometric albedo are 0.35 (±0.03) km and0.23 (+0.07, -0.05), respectively.While these values are model-dependent, we conclude that this Apolloclass 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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