Physical Characteristics
The size of 2003 UZ413 is not known but a reasonable estimate is around 600 km. Given its rapid rotation it must have a density higher than 0.72 g/cm3. Stable Jacobi ellipsoids with an axis ratio of a/b ≥ 1.13 ± 0.03, as implied by its light-curve amplitude of Δm = 0.13 ± 0.03, exist for densities in the range of 2.29−3.00 g/cm3.
In visible light this object is neutral or slightly red in color and has a flat featureless reflectance spectrum.
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