Pluto and Charon - The dance goes on

Details Pluto and Charon - The dance goes on Pluto and Charon - The dance goes on

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987s%26t....74..248b&link_type=abstract

Sky and Telescope (ISSN 0037-6604), vol. 74, Sept. 1987, p. 248-251.

Astronomy and Astrophysics

Astronomy

Astronomical Spectroscopy, Charon, Infrared Interferometers, Pluto Atmosphere, Satellite Atmospheres, Atmospheric Composition, Methane, Planetary Rotation, Speckle Patterns, Pluto, Satellites, Pluto-Charon System, Diagrams, Interferometry, Earth-Based Observations, Brightness, Atmosphere, Physical Properties, Characteristics, Telescope Methods, Size, Mass, Density, Techniques, Diameter, Occultations, Astronomy, Surface, Reflectivity, Hypotheses, Lightcurves, Optical Properties, Eclipses, Infrared, Wavelengt

Scientific paper

Various methods for estimating the diameters of Pluto and Charon are discussed. The application of speckle interferometry, the timing of occultations, and the monitoring of Charon and Pluto rotations to calculate the diameter of the planet and its satellite are described. Walker (1980) estimated Charon's diameter as greater than 1200 km using the occultated star method; the speckle interferometry estimates of Baier and Weigelt (1983) are between 2710-3460 km for Pluto and between 1050-1520 km for Charon; and using the mutual events method Dunbar and Tedesco (1986) estimated the diameter of Pluto as 2300 + or - 100 km and of Charon as 1500 + or - 100 km. The use of IRAS data combined with visual brightness to estimate planet and satellite diameters is examined; Tedesco et al. (1987) estimated Pluto's diameter as 2200 + or - 150 km and Charon's as 1300 + or - 150 km, and Aumann and Walker (1987) obtained estimates of 2360 km for Pluto and 1534 km for Charon. The compositions of Pluto's and Charon's atmospheres are analyzed.

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