Photometric evidence on long-term stability of albedo and colour markings on Io

Details Photometric evidence on long-term stability of albedo and colour markings on Io Photometric evidence on long-term stability of albedo and colour markings on Io

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.280..753m&link_type=abstract

Nature, vol. 280, Aug. 30, 1979, p. 753-755.

Astronomy and Astrophysics

Astronomy

6

Albedo, Astronomical Photometry, Io, Volcanology, Electrophotometry, Long Term Effects, Secular Variations, Ubv Spectra, Voyager Project

Scientific paper

Photometric measurements of the color and albedo of Io during the last 50 years are examined in order to determine the stability of the Ionian surface. Brightness measurements of Io relative to Ganymede show a slight, however inconclusive, increase with time, while light curve amplitudes and shapes are found to agree well during this period. The extent of volcanic activity observed by Voyager 1, however, is shown to be undetectable with the precision attainable by earth-based albedo determinations, and just barely detectable as color changes, which explains the observed photometric stability. Possible mechanisms for the preservation of the observed longitudinal distribution of color on Io are also discussed.

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