Resolving dynamic parameters of the August 2007 Titania and Ariel occultations by Umbriel

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 07:5...

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Bibliographic Details
Published in:Icarus (New York, N.Y. 1962) N.Y. 1962), 2009-03, Vol.200 (1), p.343-346
Main Authors: Miller, C., Chanover, N.J.
Format: Article
Language:English
Subjects:
Astronomy
dynamics
Earth, ocean, space
Exact sciences and technology
Occultations
Orbit determination
satellites
Solar system
surfaces
Uranus
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Summary: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.
ISSN:0019-1035
1090-2643
DOI:10.1016/j.icarus.2008.12.010