R. L. Allen et al 2006 ApJ 640 L83 doi:10.1086/503098
Discovery of a Low-Eccentricity, High-Inclination Kuiper Belt Object at 58 AU
FREER. L. Allen1, B. Gladman1, J. J. Kavelaars2, J.-M. Petit3, J. W. Parker4 and P. Nicholson5
Show affiliationsWe report the discovery of the first trans-Neptunian object, designated 2004 XR190, with a low-eccentricity 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 trans-Neptunian objects with large orbital perihelia and inclination.
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Issue 1 (2006 March 20)
Received 2005 December 15, accepted for publication 2006 February 2
Published 2006 March 3
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Discovery of a Low-Eccentricity, High-Inclination Kuiper Belt Object at 58 AU
R. L. Allen et al 2006 ApJ 640 L83
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