Remus, the second moon, was discovered over three years later on August 9, 2004 by Franck Marchis of UC Berkeley, and Pascal Descamps, Daniel Hestroffer, and Jérôme Berthier of the Observatoire de Paris, France.
=== Romul ===Luno Romul sta odkrila Michael E. Brown in Jean-Luc Margot 18. februarja 2001 s pomočjo Daljnogleda Keck II.