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Fig. 4


Aspect angle versus time. Left panel: the continuous line shows the aspect angle of Chiron’s rings as a function of time for the nominal pole direction that we obtained from the analysis of the occultations of the rings (λ = 352 ± 10°, β = 37 deg ± 10 °). The rest of the lines correspond to solutions within the uncertainties of the nominal pole. The vertical and horizontal lines are shown to highlight that in 2001 the aspect angle of the rings was 90 degrees. The right panel shows the aspect angle as a function of time for the other pole direction (λ = (144 ± 10)°, β = (24 ± 10)°).

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