It was discovered on 29 July 1990, by American astronomer Henry E. Holt at Palomar Observatory in California, United States.
It is estimated that every 100 million years, about 37 to 75 Maria asteroids larger than 1 kilometer become near-Earth objects.
Lightcurve analysis gave a rotation period of 25.8 hours with a brightness variation of 0.16 magnitude (U=2+).
[5][6] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from 15 Eunomia, the family's largest member and namesake – and calculates a diameter of 10.53 kilometers with an absolute magnitude of 12.2.
[3] This minor planet was named in honor of American amateur astronomer and publisher Ken Graun (born 1955), author of two books on astronomy, owner of "Ken Press" and the website What's Out tonight?, bringing astronomy to the broader public including children.