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 \pm 0.4 , e = 0.08 \pm 0.04 , and i = 46.6 ^ { \circ } .
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 .