Maximum Visible Polarization of 4179 Toutatis in the Apparition of 1996

Publications of the Astronomical Society of Japan

Kogachi, Motofumi²  Mukai, Tadashi²  Ishiguro, Masateru²  Nakayama, Hiroyuki²  Hirata, Ryuko³  Okazaki, Akira⁴  Nakamura, Ryosuke¹ 

[1] Information Processing Center, Kobe University, Nada, Kobe 657;The Graduate School of Science and Technology, Kobe University, Nada, Kobe 657 E-mail:;Department of Astronomy, Faculty of Science, Kyoto University, Sakyo-ku, Kyoto 606-01;Department of Science Education, Gunma University, Maebashi, Gunma 371

关键词: Asteroids;    "Near earth asteroids";    Polarimetry;    "Solar system";   

DOI  :  10.1093/pasj/49.5.L31

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

Ourvisiblepolarimetryofasteroid4179Toutatisduringtheapparitionof1996hasrevealedtheexistenceofamaximumpolarizationPmaxof(7.0±0.2)%ataphaseangle(Sun-asteroid-observerangle)αmaxof107°±10αataneffectivewavelengthof0.53μm.ThisisthesecondsignificantreportofPmaxandαmaxfortheasteroids;thefirstonefor1685TorobyKiselevetal.(1990,AAA51.098.084)haslargeuncertainties.AcomparisonofourvaluesofPmaxand{αmaxwiththoseoflaboratorymeasurementsreportedbyBowelletal.(1972,Proc.LunarSci.Conf.)aswellasShkuratovandOpanasenko(1992,AAA56.094.027)suggeststhattheToutatis'surfaceiscoveredwithamaterialhavingsimilarpolarimetricpropertiestothoseoflunarfineswithasizeoflessthan80μm.Furthermore,ourmulti-channelpolarimetryhasconfirmedadecreaseinthepolarizationwithincreasingwavelength.

【 授权许可】

Unknown