Resolving dynamic parameters of the August 2007 Titania and Ariel occultations by Umbriel |
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| Authors: | C Miller NJ Chanover |
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| Institution: | Box 30001/Dept. 4500, Department of Astronomy, New Mexico State University, Las Cruces, NM 88003-0001, USA |
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| Abstract: | We observed the 15 August 2007 occultation of the uranian satellite Titania and the 19 August 2007 occultation of Ariel by Umbriel using the Agile high-speed photometer on the APO 3.5 m telescope. We find that the Titania event midpoint occurred at 09:16:39.20 UT and the Ariel event midpoint at 07:59:49.4 UT, which was 26.2 s and 37.4 s later than predicted, respectively. Our best fit impact parameter was 71.0 km for the Titania occultation and 476.9 km for the Ariel event, both of which were less than predicted. |
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| Keywords: | Occultations Uranus satellites Orbit determination Satellites dynamics Satellites surfaces |
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