Mutual events in the Uranian system: the 2007 Brazilian observational campaign by the Rio Group

Details Mutual events in the Uranian system: the 2007 Brazilian observational campaign by the Rio Group Mutual events in the Uranian system: the 2007 Brazilian observational campaign by the Rio Group

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008epsc.conf..471v&link_type=abstract

European Planetary Science Congress 2008, Proceedings of the conference held 21-25 September, 2008 in Münster, Germany. Online a

Computer Science

Scientific paper

Following the mutual events in the Uranian system, predicted for 2007 by Arlot et al. (2006) for the LNA Observatory (site 874, Itajuba, Brazil), we have successfully recorded and reduced 14 events including hazing ones and comprising all main 5 satellites. From these, 6 occultations and 3 eclipses actually occurred, as predicted. Here we present the results. The observations were carried out at the 1.6m B&C telescope using an I filter to cut the planet light. To further diminish this effect, we have developed and applied a technique we call digital coronagraphy, which successfully eliminated the planet's light scatter to within only 5 arcsec from the planet. We applied a model which describes the light drop during the occultation, allowing for the determination of the central instant of occultation, of the impact parameter and of the albedo ratios. All obtained light curves are analyzed and discussed, including results for Miranda. Prospects for the upcoming Brazilian campaign of the mutual events of the Saturn system in 2009 are also given.

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