Definitions for "(136108) 2003 EL61"
EL61), is a large (roughly one-third the mass of Pluto) Kuiper belt object discovered by J. L. Ortiz et al. of the Instituto de Astrofísica de Andalucía at Sierra Nevada Observatory (Spain) and Mike Brown's group at Caltech in the United States. The MPC currently gives formal discovery credit to the group of Ortiz et al.