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-class spectra of the three largest family members, (58) Concordia, (128) Nemesis, and (210) Isabella, but another allocated member, (340) Eduarda, has an S-class 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 2.700 AU, period 4.44 years, perihelion 2.58 AU, aphelion 2.82 AU, and inclination 5°.1.
Subjects: Astronomy and Astrophysics.