2003 QX113 orbits the Sun at a distance of 37.7–62.2 AU once every 353 years and 1 month (128,966 days; semi-major axis of 49.96 AU). Its orbit has an eccentricity of 0.25 and an inclination of 7° with respect to the ecliptic.[4]
It is classified as a scattered disc object,[5] or "near-scattered" object in the classification of the Deep Ecliptic Survey,[7] that still gravitationally interacts with Neptune (30.1 AU) due to its relatively low perihelion of 37.7 AU, contrary to the extended-scattered/detached objects and sednoids which never approach Neptune as close. It has also been described as a "detached classical belt object" by the discovering Canada–France Ecliptic Plane Survey (CFEPS), that are objects with a semi-major axis beyond the 2:1 mean-motion resonance (i.e. beyond the twotino population at 47.8 AU) and with an eccentricity larger than 0.24.[3]: 4 It was furthest object discovered in CFEPS.[3]: 8
Based on a generic magnitude-to-diameter conversion, 2003 QX113 measures approximately 423 kilometers (260 miles) in diameter, for an assumed albedo of 0.9 and an magnitude of 5.1.[5][8] As of 2021[update], no rotational lightcurve for this object has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.[4]