Mutual phenomena of Jupiter's satellites

Details Mutual phenomena of Jupiter's satellites Mutual phenomena of Jupiter's satellites

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979icar...37..264a&link_type=abstract

Icarus, vol. 37, Jan. 1979, p. 264-271. Research supported by the Conselho Nacional de Pesquisas and Financiadora de Estudos e

Physics

2

Albedo, Eclipses, Galilean Satellites, Occultation, Europa, Io, Light Curve, Jupiter, Satellites, Occultations, Europa, Io, Light Curve, Models, Radius, Brightness, Photometry, Observations, Scintillations

Scientific paper

Observations of an occultation of Europa by Io are fitted by a model light curve. The model has five free parameters, namely, the radius of Europa, the impact parameter, the brightness ratio of the satellites, the time of midevent, and the mean relative velocity. The model assumes a fixed value for the radius of Io and for the solar phase angle and that Europa has a uniform surface brightness. The O-C residuals of the best-fitting light curve are very small (about 0.002 mag) and of a purely random nature; there is no evidence of albedo features. Taking a solar phase angle of zero does not affect significantly the quality of the fit. Six mutual eclipses were observed and their times of minima agree well with the predictions of Aksnes (1974). For two events these predictions differ by about 20 min from those of Brinkmann and Millis (1973).

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