Currently 58 astronomical units from the Sun (1 astronomical unit,
or AU, is the
distance between the Earth and the Sun), the new object never
approaches closer than 50 AU, because its orbit is close to
circular. Almost all Kuiper belt objects discovered beyond Neptune
are between 30 AU and 50 AU away. Beyond 50 AU, the main Kuiper belt
appears to end, and what few objects have been discovered beyond this
distance have all been on very high eccentricity (non-circular)
orbits. Most of these high-eccentricity orbits are the result of
Neptune "flinging" the object outward by a gravitational
slingshot. However, because this new object does not approach closer
than 50 AU, a different theory is needed to explain its orbit.
the problem, the object's orbit also has an extreme tilt, being
inclined (tilted) at 47 degrees to the rest of the Solar System.