The potential to determine Pluto's radius from mutual event lightcurves, HST imaging, and Charon's radius and orbital parameters

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Scientific paper

We present a sensitivity analysis for Pluto's radius constrained by the combination of mutual event lightcurves, HST albedo maps, and Charon stellar occultation radius. Stellar occultations by Pluto are powerful probes of its atmosphere but attenuation due to differential refraction precludes direct measurement of the surface radius. Mutual event lightcurves have the potential to directly and accurately constrain the Charon/Pluto size ratio. However, the surface albedo distribution, limb-darkening, and orbital parameters also affect the observed lightcurces. We investigate the correlated sensitivities of all of these effects on Pluto's radius solution.

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