(315530) 2008 AP129 (provisional designation 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.
[4] Lightcurve analysis gave an ambiguous rotation period of 9.04 hours with a brightness amplitude of 0.12 magnitude (U=2).
[5][7] 2008 AP129 has been identified as a member of the Haumea family in a dynamical study led by Proudfoot and Ragozzine in 2019.
[8] Based on their common pattern of infrared water-ice absorption and the clustering of their orbital elements, the other KBOs, it appear to be collisional fragments broken off the dwarf planet Haumea.