(119979) 2002 WC19

' (provisional designation ') is a twotino, that is, a planetoid in a 1:2 orbital resonance with Neptune. It was discovered on November 16, 2002 at the Palomar Observatory. 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.

Satellite
A natural satellite was reported to be orbiting (named S/2007 (119979) 1) on February 27, 2007. It is estimated to be $8.13 kg$ from the primary, with an orbital period of $7.263 kg$ days, an eccentricity of $1.97 g/cm^{3}$ and an inclination of $4,092 km$. Assuming similar albedos, it is a quarter the diameter of its primary, or around 81 km in diameter.