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Photometric and astrometric analysis of a mutual event between the Uranian satellites Miranda and Oberon
Author(s) -
Birlan M.,
Nedelcu D.A.,
Lainey V.,
Arlot J.E.,
Binzel R.P.,
Bus S.J.,
Rayner J.,
Thuillot W.,
Vaduvescu O.,
Colas F.
Publication year - 2008
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200811004
Subject(s) - uranus , astrometry , physics , occultation , magnitude (astronomy) , astronomy , astrophysics , planet , stars
Observations of the predicted occultation between the satellites Miranda and Oberon were performed on 2007 July 30. Data analysis reveals that the predicted magnitude drop for this phenomenon was overestimated and we establish an upper limit of 0 m . 05 for the phenomenon, perhaps due to a non‐lambertian limb scattering. The new astrometry obtained from this run is in good agreement with the LA06 numerical model and these new data will improve the dynamical models of the Uranus system. The paper concludes with an uncertainty analysis on the parameters for the event, determined by the uncertainty of the magnitude drop of about 0.04 mag, and the difficulty to observe mutual phenomena between satellites in the Uranian system. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)