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Discovery of a low-eccentricity, high-inclination Kuiper belt object at 58 AU

R. L. Allen·B. Gladman·J. J. Kavelaars·J-M. Petite·J. Wm. Parker·P. Nicholson
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Abstract

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

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R. L. Allen, B. Gladman, J. J. Kavelaars, J-M. Petite, J. Wm. Parker, P. Nicholson. 2005-12-16. Discovery of a low-eccentricity, high-inclination Kuiper belt object at 58 AU. https://doi.org/10.1086/503098

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