Melpomene occulted the star SAO 114159 on December 11, 1978. A possible satellite with a diameter at least 37 km was detected. The satellite candidate received a premilinary designation S/1978 (18) 1[1] (http://cfa-www.harvard.edu/iauc/03300/03315.html).
Melpomene was observed with the Hubble Space Telescope in 1993. It was able to resolve the asteroid's slightly elongated shape, but no satellites were detected [2] (http://web.media.mit.edu/~win/hstpub.pdf).
