10 μm polarimetry of ceres

Paul E. Johnson, James C. Kemp, Marcia J. Lebofsky, George H. Rieke

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14 Scopus citations

Abstract

Linear polarimetry of Ceres at 10 μm is presented. These data represent the first published polarization measurements of an asteroid in the thermal infrared. It is found that Ceres is polarized at the 0.2-0.6% level. This data set is compared with theoretical models of the linear polarization of emitted radiation from a spherical plane. These models are used to derive the pole position and thermal inertia of Ceres. Ceres is best fit with a thermal inertia of 0.0010±0.0003 cal cm-2 °K-1 sec 1 2 and a pole orientation of βp = 36° ± 5°, λp = 270° ± 3°. It is concluded that 10μm polarimetry is a potentially powerful technique for remotely sensing the pole orientation and thermal inertia of asteroids.

Original languageEnglish (US)
Pages (from-to)381-392
Number of pages12
JournalIcarus
Volume56
Issue number3
DOIs
StatePublished - Dec 1983

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ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Johnson, P. E., Kemp, J. C., Lebofsky, M. J., & Rieke, G. H. (1983). 10 μm polarimetry of ceres. Icarus, 56(3), 381-392. https://doi.org/10.1016/0019-1035(83)90159-8