Claim: 1585 Union is an asteroid that orbits the sun every five point zero one years, but is not a member of any known asteroid family that would share similarproper orbital elements such as semimajor axis, eccentricity, and orbital inclination.
Evidence: It orbits the Sun in the outer main belt at a distance of 2.0–3.8 AU once every 5.01 years (1,830 days). Union is not a member of any known asteroid family. An asteroid family is a population of asteroids that share similar proper orbital elements, such as semimajor axis, eccentricity, and orbital inclination.