A small but well-defined Hirayama family of asteroids in the main asteroid belt, mean distance 2.70–2.75 au from the Sun. Its members have orbital inclinations of 4–6°. There are only small differences between the C-type spectra of the three largest family members, (58) Concordia, (128) Nemesis, and (210) Isabella, but another allocated member, (340) Eduarda, has an S-type spectrum and may not be a true family member. Concordia itself, 93 km in diameter, was discovered in 1860 by the German astronomer (Karl Theodor) Robert Luther (1822–1900). Concordia’s orbit has a semimajor axis of 2.70 au, period 4.44 years, perihelion 2.58 au, aphelion 2.82 au, and inclination 5°.1.