Alexandra family (of asteroids)

The Alexandra family is a small family of main-belt asteroids lying at a mean distance of 2.6 to 2.7 AU from the Sun, with orbital inclinations of 11 to 12° and a variety of compositions, including representatives from classes C, G, and T. The prototype, 54 Alexandra, was discovered in 1858 by Hermann Goldschmidt.


Data for 54 Alexandra
diameter 165 km
spectral class C
semimajor axis 2.710 AU
perihelion 2.18 AU
aphelion 3.25 AU
eccentricity 0.199
inclination 11.8°