France.

نویسندگان

  • J P Poullier
  • S Sandier
چکیده

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 ± 0.4, e = 0.08 ± 0.04, and i = 46.6 •. 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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عنوان ژورنال:
  • Journal of health politics, policy and law

دوره 25 5  شماره 

صفحات  -

تاریخ انتشار 2000