ALPO Observations of Saturn During the 1998-99 Apparition

Details ALPO Observations of Saturn During the 1998-99 Apparition ALPO Observations of Saturn During the 1998-99 Apparition

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jalpo..43d..31b&link_type=abstract

Journal of the Association of Lunar & Planetary Observers, The Strolling Astronomer (ISSN 0039-2502), Vol. 43, No. 4, p. 31 - 43

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Scientific paper

Eighteen observers residing in France, Germany, Italy, the United Kingdom, New Zealand, and the United States submitted 175 visual, photographic, and CCD observations of Saturn during the 1998-99 Apparition, covering the period from 1998 June 26 - 1999 March 28. Instruments used in performing these observations ranged in aperture from 10.2 cm (4.0 inches) up to 50.8 cm (20.0 inches). Observers reported periodic, but extremely vague, festoons and other dusky phenomena among the belts and zones of Saturn's Southern Hemisphere during the apparition. Several very ill-defined white ovals were suspected in the planet's Southern Equatorial Zone (EZs) from early 1998 August through late 1999 January. These Saturnian atmospheric features were too transient for meaningful central meridian (CM) transit timings, and it was not possible to derive rotation rates for different Saturnian latitudes during the 1998-99 Apparition. During the 1998-99 observing season, the inclination of the Ring System to our line of sight, B, reached a maximum value of -16̂.728 on 1998 August 09. With the Rings steadily opening after the edgewise Ring presentations of 1995-96, observers experienced improved views of Saturn's Southern Hemisphere and the south face of the Rings. Accompanying this report are references, drawings, CCD and video images, graphs, and tables.

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