Discovery of a Low-Eccentricity, High-Inclination Kuiper Belt Object at 58 AU | Zendy

R. L. Allen | Zendy; Brett Gladman | Zendy; J. J. Kavelaars | Zendy; J. Petit | Zendy; J. W. Parker | Zendy; P. D. Nicholson | Zendy

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Discovery of a Low-Eccentricity, High-Inclination Kuiper Belt Object at 58 AU

Author(s) -

R. L. Allen,

Brett Gladman,

J. J. Kavelaars,

J. Petit,

J. W. Parker,

P. D. Nicholson

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/503098

Subject(s) - physics , eccentricity (behavior) , orbit (dynamics) , trans neptunian object , astronomy , mean motion , orbital eccentricity , population , astrophysics , orbital elements , solar system , planet , aerospace engineering , demography , sociology , political science , law , engineering

We report the discovery of the first trans-neptunian object, designated 2004XR190, with a nearly-cirular orbit beyond the 2:1 mean-motion resonance.Fitting an orbit to 23 astrometric observations spread out over 12 monthsyields an orbit of a=57.2\pm0.4, e=0.08\pm0.04, and i=46.6 deg. All viableorbits have perihelia distances q>49 AU. The very high orbital inclination ofthis extended scattered disk object might be explained by several models, butits existence again points to a large as-yet undiscovered population oftransneptunian objects with large orbital perihelia and inclination.Comment: 3 figures, submitted to ApJ

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