Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..33..453f&link_type=abstract
Astrophysics and Space Science, vol. 33, Apr. 1975, p. 453-457.
Astronomy and Astrophysics
Astrophysics
16
Planetary Rotation, Planetary Structure, Ring Structures, Saturn Rings, Albedo, Computer Programs, Data Reduction, Gravitational Effects, Tides
Scientific paper
An analysis of the Lowell Observatory photographic plates of Saturn gave the following results: (1) ring A and B show peculiar brightness distributions around the planet, from which we con- clude that both are composed of particles in synchronous rotation. (2) The leading side of the particles in ring A is brighter than the trailing side by about 4%, which may indicate an interaction between such particles and the interplanetary medium. (3) Scans of the rings across the major axis show a small (`~` 0.3") region of enhanced brightness, from which we derive a value of T~= 1Ohh139~8 ± 59~4 for the actual planetary rotational period of Saturn. (4) In order to explain the synchronous rotation, the particles in ring A have to be at least 42 m in diameter
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