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Fig. 2


Stellar occultation in 1994: adapted Fig. 2 of Elliot et al. (1995) showing the plane of the sky centered on Chiron (whose center was determined astrometrically, not from the occultation). The location of the relevant lightcurve features are indicated by labels F1, F2, F3, and F4. See Elliot et al. (1995) for the description of the features and to get relevant data regarding the occultation. The incomplete black circle corresponds to the position where a spherical Chiron should have been with respect to the star paths for SAAO and KAO according to astrometric measurements. The orbit plane of Chiron is shown for reference. The red ellipse is the projected shape of a ring system whose pole was determined in 2011. The corresponding position angle of the ellipse in 1994 is 1 degree, and the aspect angle is 30 degrees or 150 degrees for the two pole solutions. The intersections of this ellipse with the star paths from the two observing sites indicate where sharp occultation events would be detectable. As can be seen, the ring would clearly cause both the F1 feature and the F2 feature (whose maximum sharpness was not at the beginning of the label F2 in this figure, but slightly later, see text). The filled ellipse corresponds to a plausible position and to the shape of Chiron.

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