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Results from the 2014 november 15th. multi-chord stellar occultation by the TNO (229762) 2007 UK126

AuthorsBenedetti-Rossi, G.; Ortiz, José Luis ; Morales, Nicolás ; Duffard, René D. ; Santos Sanz, Pablo ; Skiff, B.
KeywordsKuiper belt objects: individual (229762, 2007 UK126)
planets and satellites: fundamental parameters
Issue Date11-Nov-2016
PublisherAmerican Astronomical Society
CitationAstronomical Journal 152(6): 156 (2016)
AbstractWe present results derived from the first multi-chord stellar occultation by the trans-Neptunian object (229762) 2007 UK, observed on 2014 November 15. The event was observed by the Research and Education Collaborative Occultation Network project and International Occultation Timing Association collaborators throughout the United States. Use of two different data analysis methods obtain a satisfactory fit to seven chords, yielding an elliptical fit to the chords with an equatorial radius of R = 338 km and equivalent radius of R = 319 km. A circular fit also gives a radius of R = 324 km. Assuming that the object is a Maclaurin spheroid with indeterminate aspect angle, and using two published absolute magnitudes for the body, we derive possible ranges for geometric albedo between p = 0.159 and p = 0.189 , and for the body oblateness between ∈ = 0.105 and ∈ = 0.118 . For a nominal rotational period of 11.05 hr, an upper limit for density of ρ = 1740 kg m is estimated for the body.
DescriptionBenedetti-Rossi, G. et. al.
Identifiersdoi: 10.3847/0004-6256/152/6/156
issn: 0004-6256
Appears in Collections:(IAA) Artículos
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