Results from the 2014 November 15th multi-chord stellar occultation by the TNO (229762) 2007 UK${}_{126}$

Abstract

We present results derived from the first multi-chord stellar occultation by the trans-Neptunian object (229762) 2007 UK${}_{126}$, observed on 2014 November 15. The event was observed by the Research and Education Collaborative Occultation Network (RECON) project and International Occultation Timing Association (IOTA) collaborators throughout the United States. Use of two different data analysis methods obtain a satisfactory fit to seven chords, yelding an elliptical fit to the chords with an equatorial radius of $R=338_{-10}^{+15}$ km and equivalent radius of $R_{eq}=319_{-7}^{+14}$ km. A circular fit also gives a radius of $R=324_{-23}^{+30}$ 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 $p_V=0.159_{-0.013}^{+0.007}$ and $p_R=0.189_{-0.015}^{+0.009}$, and for the body oblateness between $\epsilon =0.105_{-0.040}^{+0.050}$ and $\epsilon =0.118_{-0.048}^{+0.055}$. For a nominal rotational period of 11.05 h, an upper limit for density of $\rho =1740$ kg~m${}^{-3}$ is estimated for the body.

arXiv comment40 pages, 5 figures, 4 tables. Accepted for publication in the The Astronomical Journal (Aug. 1, 2016)

References in corpus (11)

• A ring system detected around the Centaur (10199) Chariklo
• Predicting Stellar Angular Sizes
• The Compositions of Kuiper Belt Objects
• Possible ring material around centaur (2060) Chiron
• An Outer Planet Beyond Pluto and Origin of the Trans-Neptunian Belt Architecture
• "TNOs are Cool": A Survey of the Transneptunian Region IV. Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel Space Observatory-PACS
• Colors and taxonomy of Centaurs and Trans-Neptunian Objects
• Orbit determination of Transneptunian objects and Centaurs for the prediction of stellar occultations
• Rotational properties of the binary and non-binary populations in the Trans-Neptunian belt
• Candidate stellar occultations by large trans-neptunian objects up to 2015
• JWST observations of stellar occultations by solar system bodies and rings

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