2001 QW322

2001 QW322 is a double asteroid in the Kuiper Belt and consists of two bodies of nearly identical mass whose diameter is estimated to be around 130 km. The object was discovered on July 27, 2001 by John J. Kavelaars, Jean -Marc Petit, Brett Gladman and Matthew J. Holman. On August 24, 2001, it was determined by Kavelaars that there is a double asteroid.

A study published in 2008, was found one for such an object unusually long orbital period of about 25 to 30 years and a semi-major axis 105000-135000 km. The orbit is retrograde and has an inclination of 50 ° to 62 ° on; the eccentricity of the orbit also is below 0.4. Such orbital parameters are very unusual and pose a challenge to current theories on the origin and evolution of double asteroids dar. Since the gravitational bond is weak in this configuration, the lifetime should probably be in this state under a billion years.