Astronomy and Astrophysics – Astronomy
Scientific paper
May 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977lastr..91..203d&link_type=abstract
L'Astronomie, vol. 91, May 1977, p. 203-210. In French.
Astronomy and Astrophysics
Astronomy
Astronomical Photography, Astronomical Photometry, Luminous Intensity, Saturn (Planet), Albedo, Astronomical Models, Infrared Radiation, Microdensitometers, Saturn Atmosphere
Scientific paper
Observations of Saturn made from 1973 to 1976 are highlighted. Difficulties encountered in photographing the planet are discussed, and images made by different observers are presented and compared. Special attention is given to microphotometric studies of images of Saturn made at the Vitorre Observatory (Bologne) and the Anacapri Observatory (Naples). Although the albedo of the rings is more or less uniform for the three spectral zones examined (.67-.95; .45-.65; and .37-.50 microns), the globe of the planet itself is less luminous in the violet than in the yellow and infrared. This may be due to the composition of the planet's atmosphere or to addition of an infrared radiation peculiar to the planet to the reflected light of the sun.
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