New aspects of the binary planet Pluto-Charon

Details New aspects of the binary planet Pluto-Charon New aspects of the binary planet Pluto-Charon

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991msngr..66...23b&link_type=abstract

ESO Messenger (ISSN 0722-6691), no. 66, p. 23-26.

Physics

2

Charon, Light Curve, Planetary Orbits, Planetary Structure, Pluto (Planet), Planetary Rotation, Planetary Systems, Polar Caps

Scientific paper

The mutual eclipse light curves of Pluto and Charon are analyzed. Six transits of Charon in front of Pluto and eight occultations of Charon by Pluto were observed from 1985 to 1990 using the ESO/MPI 2.2-m telescope and the Danish 1.5-m telescope, respectively. High-precision differential photometry was obtained using CCD direct imaging techniques. It is found that there is a dark north polar cap on Pluto which can be explained under the assumption that the surface structures have changed during the past 35 years (Stern et al., 1988). This finding is in contradiction with the bright polar caps required by models of Marcialis (1988) and Buie and Tholen (1989).

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