Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...47...84b&link_type=abstract
Icarus, vol. 47, July 1981, p. 84-96.
Astronomy and Astrophysics
Astronomy
69
Brightness Distribution, Charge Coupled Devices, Enceladus, Infrared Astronomy, Saturn Rings, Telephotometry, Flyby Missions, Focal Plane Devices, Pioneer 11 Space Probe, Planetary Evolution, Space Observations (From Earth), Saturn, Rings, E Ring, Satellites, Enceladus, Radius, Distribution, Evolution, Analysis, Distance, Equipment, Photometry, Observations, Ejecta, Brightness, Data, Designs, Procedure, Techniques
Scientific paper
Observations of the tenuous E ring of Saturn made by an earth-based CCD system at the time of the ring-plane crossing of March 1980 are presented. The observations were made with the CCD system attached to the 1.8-m Perkins reflector at Lowell Observatory using a pupil mask behind a focal plane mask to suppress telescopic diffraction. Photometric analysis of the CCD images reveal the edge-on brightness profile of the ring, beginning at a distance of 3 Saturn radii, to peak sharply in the vicinity of the orbit of Enceladus at about 4 Saturn radii, then decrease to a distance of over 8 Saturn radii. In addition, beyond Enceladus, the edge-on width of the ring is observed to increase with radial distance, reaching nearly 5 arcsec at 7 Saturn radii. Observations suggest, on the one hand, that the E ring is associated with Enceladus and possibly represents material ejected from the satellite, and on the other, that the ring is at an early stage in its evolution.
Baum William A.
Currie Douglas G.
Danielson Edward G.
Kreidl T.
Pascu Dan
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