Leda is also the smallest moon of Jupiter*.
Mass..........................6 x 1015 kg
Mean Radius...................5 km
Mean Distance from Jupiter....11,000,000 km
Orbital period................238 days
Gravity relative to Earth ....2.364
Leda was discovered by C. Kowal in 1974

*Naturally, when talking about the smallest member of a set who's membership is defined by size, definitions become contraversial.