A Statistical Analysis on the Color and Orbit Parameters of Centaurs |
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| Authors: | Li Xue-jing |
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| Institution: | a National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011;b Graduate University of Chinese Academy of Sciences, Beijing 100049 |
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| Abstract: | In order to study the statistical characters and physical significance of the color indexes and orbital parameters of Centaurs, we have analyzed the color and orbit parameter correlations by using statistical methods according to the known color indexes of 39 Centaurs and their respective orbital parameters. We find that all the correlations of B ? V vs. V ? R, V ? R vs. R ? I, B ? V vs. R ? I and B ? R vs. R ? I are strong. The Centaurs exhibit obvious redblue double-color property, and the point of demarcation is close to B ? R = 1.4. The distributions of the various color indexes of Centaurs exhibit the normal distribution. For the correlations between colors and orbital parameters, except for the weak correlations between B ? V and the orbital inclination i as well as between V ? R and the orbital semi-major axis a, no evident correlation has been found between color indexes and orbital parameters. |
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| Keywords: | asteroids: Centaurs celestial mechanics methods: statistical |
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