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M. Holman (Harvard-Smithsonian Center for Astrophysics), B. Gladman (Observatoire de la Cote d'Azur), JJ Kavelaars (McMaster University), J.-M. Petit, H. Scholl (Observatoire de la Cote d'Azur), P. Nicholson, J. A. Burns (Cornell University)
In July 1999, we conducted a wide-field search for new satellites of Uranus and Neptune. Our search was motivated by the discovery of the first 2 irregular satellites of Uranus in 1997 (Gladman et al 1997, Nature, v 392, 897) in a cursory CCD search of the immediate vicinity of Uranus. Using the CFH12K mosaic camera on the 3.5-meter Canada-France-Hawaii Telescope, we searched a substantial fraction of the Hill spheres of both planets to a 50% detection threshold of mR = 24.3 ±0.3. Our effort uncovered three new Uranian satellite candidates, tens of Kuiper belt objects, but no Neptunian satellite candidates. After a concerted observational campaign to establish and refine the orbits of the new satellite candidates, these objects have now been designated Uranus XVIII (Prospero), XIX (Setebos), and XX (Stephano).
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