 A first precovery of was taken at the Cerro Tololo Observatory in Chile on 15 October 2004.It was first observed by a research team while poring over images that the Canada–France–Hawaii Telescope in Hawaii took in September 2015 as part of the Outer Solar System Origins Survey (OSSOS), and later identified in images taken at Sloan Digital Sky Survey and Pan-STARRS between 2008 and 2016.The discovery was formally announced in a Minor Planet Electronic Circular on 10 July 2016.