2004 XR190

2004 XR190 is a Transneptunisches object from the group of Scattered Disk Objects with a diameter of 500 to 1000 kilometers and an apparent magnitude of 21.8 at a distance like 52-62 AU from the Sun. Its orbital period is about 431 years.

Noteworthy is the high inclination ( orbital inclination ) of 47 ° to the ecliptic, and the fairly low eccentricity of only 0.08. The object was discovered because it just happened to be crossing the plane of the ecliptic, and so noticed in the search for distant objects in the solar system. This suggests that there may still are many more, as yet undiscovered objects with similar orbital parameters.

The origin of this high inclination is still unclear. 2004 XR190 moves beyond the Kuiper Belt around the Sun, there may be a 8:3 orbital resonance with Neptune. However, the perturbations due to the gravitational force of Neptune is minimal at such a distance, so that objects should be located there in an unchanged since the formation of the solar system orbit.

2004 XR190 was discovered in December 2004 by a team led by Lynne Allen of the University of British Columbia in Vancouver, Canada on Mauna Kea Observatory in Hawaii.