839 Valborg

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839 Valborg is a mid-sized asteroid in the asteroid belt. It is an S-type asteroid belonging to the Eunomia family, meaning its surface is rocky and fairly reflective. It measures about 20 kilometers across and has a high albedo of about 0.353. It rotates every 10.37 hours. It was discovered by Max Wolf at Heidelberg on 24 September 1916. It orbits the Sun every 4.23 years at an average distance of about 2.62 astronomical units, with a somewhat elongated orbit (eccentricity ~0.15) and a tilt of about 12.6 degrees.