(184212) 2004 PB112

' (provisional designation ') is a trans-Neptunian object from the scattered disc, approximately 154 km in diameter, and in a rare high-order orbital resonance ratio (4:27) with Neptune. It was discovered on 13 August 2004, by American astronomer Marc Buie at the Cerro Tololo Inter-American Observatory in Chile.

Orbit and classification
orbits the Sun at a distance of 35.3–184.6 AU once every 1153 years and 2 months (421,205 days; semi-major axis of 109.97 AU). Its orbit has a high eccentricity of 0.68 and an inclination of 15° with respect to the ecliptic. A first precovery was taken at Cerro Tololo in 2000, extending the body's observation arc by 4 years prior to its official discovery observation.

reached perihelion on 5 October 2011 (JD 2455839.806). It has been classified as a highly unusual 4:27 resonant trans-Neptunian object, but also simply as a scattered disc object, or SCATNEAR, respectively, by the Deep Ecliptic Survey.

Numbering and naming
This minor planet was numbered (184212) by the Minor Planet Center on 20 April 2008 (M.P.C. 62608). , it has not been named.

Physical characteristics
Based on a generic conversion from an absolute magnitude of 7.2, measures between 100 and 220 kilometer in diameter. Johnston's Archive estimates a mean diameter of 154 km assuming a typical albedo of 0.09.