85 Io (/ˈaɪ.oʊ/ EYE-oh) is a large dark main-belt asteroid of the C spectral class. It is probably a primitive body composed of carbonates. Like 70 Panopaea it orbits within the Eunomia asteroid family but it is not related to the shattered parent body.Io is a retrograde rotator with its pole pointing towards one of ecliptic coordinates (β λ) = (-45° 105°) or (-15° 295°) with a 10° uncertainty.[1] This gives an axial tilt of about 125° or 115° respectively.
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