(612584) 2003 QX113

(612584) 2003 QX113 is a trans-Neptunian object (TNO), a minor planet located in the outer solar system. Discovered on August 21, 2003, it is classified as a cubewano, a "classical" Kuiper Belt object (KBO) that has a low-eccentricity and low-inclination orbit, meaning it orbits relatively close to the ecliptic plane and in a nearly circular path.

Cubewanos are distinct from other KBO populations, like the Plutinos, which are locked in a 3:2 orbital resonance with Neptune. 2003 QX113's orbit is outside of significant resonance with Neptune, classifying it within the classical population.

The designation "(612584)" indicates that it is the 612584th minor planet to receive a permanent number from the Minor Planet Center (MPC). "2003 QX113" is its provisional designation, with "2003" referring to the year of discovery, "QX" indicating the half-month and sequence within that half-month when it was discovered, and "113" further distinguishing it from other objects discovered within the same time frame.

Determining the exact size of 2003 QX113 is difficult due to its great distance and relatively low albedo (reflectivity). Estimations are derived from its absolute magnitude and assumed albedo, but these estimates are subject to significant uncertainty. Without more precise measurements from space-based observatories, its precise diameter remains unknown.