(126155) 2001 YJ140 (provisional designation 2001 YJ140) is a resonant trans-Neptunian object from the outermost regions of the Solar System, approximately 154 kilometers in diameter.
It discovered on 20 December 2001, by American astronomers Chad Trujillo, Glenn Smith and Michael E. Brown at the Palomar Observatory in California.
[1] 2001 YJ140 is classified as a plutino, a large class of objects in a 2:3 orbital resonance with Neptune.
Its orbit has a semi-major axis of 42.396 AU and an orbital period of about 249 years.
This article about a centaur (minor planet) or trans-Neptunian object is a stub.