(315530) 2008 AP129

(315530) 2008 AP129 is a trans-Neptunian object and possibly a cubewano from the outermost regions of the Solar System, approximately 480 kilometers in diameter. It was discovered on 11 January 2008, by American Michael E. Brown and Megan Schwamb at Palomar Observatory in California.

Description
2008 AP129 orbits the Sun at a distance of 36.1–47.6 AU once every 270 years and 5 months (98,778 days; semi-major axis of 41.8 AU). Its orbit has an eccentricity of 0.14 and an inclination of 27° with respect to the ecliptic. It has 3 precovery observations back to 1989. Lightcurve analysis gave an ambiguous rotation period of 9.04 hours with a brightness amplitude of 0.12 magnitude (U=2). Michael Brown considers it a probable dwarf planet with an estimated diameter of 496 kilometers and albedo of 0.07. 2008 AP129 has been identified as a member of the Haumea family in a dynamical study led by Proudfoot and Ragozzine in 2019.

Numbering and naming
This minor planet was numbered by the Minor Planet Center on 7 February 2012. As of 2018, it has not been named