Asteroid 532, discovered in 1904 by Max Wolf. Observations of a stellar occultation by Herculina in 1978 indicate the presence of a companion about 50 km wide and 1000 km away. Herculina is elliptical, with a mean diameter of 222 km, and is of S type. Its orbit has a semimajor axis of 2.77 au, period 4.62 years, perihelion 2.29 au, aphelion 3.26 au, and inclination 16°.3.