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31 Euphrosyne

Minor Planet Designation31 Euphrosyne
Asteroid GroupMain Asteroid Belt (Euphrosyne family)
Orbital Period5 years, 222 days
Distance from the SunSemi-Major Axis: 473,344,631 km (3.16 AU)
Perihelion: 370,201,549 km (2.47 AU)
Aphelion: 576,487,714 km (3.85 AU)
Diameter (Mean) 267.1 kilometres
NotesA relatively large asteroid approaching 300km in diameter, Euphrosyne is thought to have formed after a violent collision nearly three hundred million years ago. Many of fragments produced by that collision were drawn together by gravity to form this asteroid, while the remainder (about two thousand smaller objects) formed the group as asteroids collectively known as the Euphrosyne family.