Improved Orbital and Physical Parameters for the Pluto-Charon System

@article{Tholen1987ImprovedOA,
  title={Improved Orbital and Physical Parameters for the Pluto-Charon System},
  author={David J. Tholen and Marc Buie and Richard P. Binzel and Marian L. Frueh},
  journal={Science},
  year={1987},
  volume={237},
  pages={512 - 514}
}
Analysis of the observations of several Pluto-Charon occultation and transit events in 1985 and 1986 has provided a more detailed knowledge of the system. The sum of the radii of Pluto and Charon is 1786 � 19 kilometers, but the individual radii are somewhat more poorly determined; Pluto is 1145 � 46 kilometers in radius and Charon is 642 � 34 kilometers in radius. The mean density of the system is 1.84 � 0.19 grams per cubic centimeter, implying that more than half of the mass is due to rock… 
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References

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TLDR
Careful observations of these eclipses will allow greatly improved determinations to be made of several physical parameters for the Pluto-Charon system: the diameters of the planet and satellite, the surface albedo distribution on one hemisphere of thePlanet, the orbit of the satellite, and the mass of the Planet and hence its density.
The orbit of Pluto's satellite
Nineteen speckle interferometric observations of the Pluto system have been used to improve the determination of the orbital elements for Pluto's satellite. Calibration uncertainties appear to be the
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Circumstances are tabulated for 81-Pluto-Charon mutual events occurring during the 1986 opposition. The deepest and longest events will occur in February and reach a depth of about 0.15 mag.
Circumstances for Pluto-Charon mutual events in 1988
Circumstances are tabulated for 88 Pluto-Charon mutual events occurring during the 1987 opposition. Charon is predicted to be completely obscured either by Pluto or Pluto's shadow during each passage
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The present first order analytical and numerical models of light curves due to mutual events between close planetary binaries, the effects of shadowing are included. Attention is given to the case of