Kuiper Belt Object 145452 (2005 RN43) is a classical Kuiper belt object. It has an estimated diameter of 679+55 -73 km. It was discovered by Andrew C. Becker, Andrew W. Puckett, and Jeremy M. Kubica on September 10, 2005 at Apache Point Observatory in Sunspot, New Mexico. Mike Brown's website lists it as highly likely a dwarf planet. Read more