(31) Euphrosyne

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(31 ) Euphrosyne is an asteroid of the outer main asteroid belt, the September 1, 1854 by James Ferguson, from the Naval Observatory in Washington, DC from, was discovered.

It was named after celestial bodies Euphrosyne, one of the Charites ( Graces ) of Greek mythology.

With a diameter of 256 km Euphrosyne is one of the largest asteroids of the main belt. It has a dark carbonaceous surface with an albedo of 0.05. In about 5.5 hours to rotate around its own axis.