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(119979) 2002 WC19

(provisional designation ) is a twotino, that is, a trans-Neptunian object in a 1:2 orbital resonance with Neptune. It was discovered on November 16, 2002, at the Palomar Observatory. Its estimated diameter predicts a density comparable to that of Pluto, which would be unusual as it is much smaller than the expected size at which a Kuiper belt object would normally becomes solid. However, the error bar for the density is 50%, consistent with the density of water ice to within one sigma.

Knowing how many twotinos there are may reveal whether Neptune took roughly 1 million or 10 million years to migrate about 7 AU from its birth location.

Satellite

On February 27, 2007, a natural satellite was reported to be orbiting . It is estimated to be from the primary, with an orbital period of days, an eccentricity of and an inclination of . Assuming similar albedos, it is a quarter the diameter of its primary, or around in diameter.

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