(55565) 2002 AW197 is a classical trans-Neptunian object from the Kuiper belt. It has a diameter of at least 700 kilometers ( i. e 430 miles). It is the largest unnamed object in the Solar System and the largest planetoid without a moon. It was discovered at Palomar Observatory in 2002. It has a rotation period of 8.8 hours.
Discovery
2002 AW197 was discovered on 10 January 2002, by astronomers at the Palomar Observatory in California. Astronomers involved in the discovery were Michael Brown, Chad Trujillo, Eleanor Helin, Michael Hicks, Kenneth Lawrence and Steven H. Pravdo.
Physical characteristics
It has a diameter of at least 700 kilometers (430 miles). It is the largest unnamed object in the Solar System and the largest planetoid without a moon.
Orbit
It orbits the Sun at a distance of 40.9–53.2 AU once every 322.6 years. Its orbit has an eccentricity of 0.13. It has an orbital inclination of 24°.