(144897) 2004 UX10

' (provisional designation ') is a Kuiper-belt object. It has a diameter of about 360 km and was discovered by Andrew Becker, Andrew Puckett and Jeremy Kubica on 20 October 2004 at Apache Point Observatory in Sunspot, New Mexico. The object is classified as a cubewano. It is near a 2:3 resonance with Neptune.

It is estimated by astronomer Michael E. Brown to likely be a dwarf planet based on its presumed size, calculated from its absolute magnitude (H) and assumed albedo.

Orbit and rotation
Based on an integration of its motion over 10 million years, has been classified as a classical Kuiper belt object (cubewano). It is near a 2:3 resonance with Neptune. The object is currently at 39 AU from the Sun.

The rotational period of is 7.58 hours.

Physical properties
The size of was measured by the Herschel Space Telescope to be $361 km$. The mass of the object is currently unknown but should be greater than about 3 kg.

has a moderately red slope in the visible spectral range. Its visible spectrum does not show any features, although there is a small departure from the linearity near 0.8 μm.