(119979) 2002 WC19 (provisional designation 2002 WC19) is a twotino, that is, a planetoid in a 1:2 orbital resonance with Neptune.

If its derived diameter is correct it would have a higher density than Pluto, which is unusual as it appears to be much smaller than the expected size at which a Kuiper belt object usually becomes solid.

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.

[7] On February 27, 2007, a natural satellite was reported to be orbiting (119979) 2002 WC19.

It is estimated to be 4092±94 km from the primary, with an orbital period of 8.403±0.001 days, an eccentricity of 0.21±0.05 and an inclination of 24.0°±0.7°.