MPC designation 2010 KZ39 | Observation arc 669 days (1.83 yr) | |
Discovered by A. UdalskiS. S. SheppardM. SzymanskiC. Trujillo(all unaccredited) Discovery site Las Campañas Obs.(first observed) Discovery date 21 May 2010(first observed) Minor planet category TNO · Detached (SDO-EXT) | ||
2010 KZ39 is a trans-Neptunian object orbiting the Sun as a Detached object in the outer reaches of the Solar System. It was first observed on 21 May 2010, by astronomers Andrzej Udalski, Scott S. Sheppard, M. Szymanski and Chad Trujillo at the Las Campañas Observatory in Chile. Measuring several hundreds of kilometers in diameter, it is likely a dwarf planet.
The minor planet orbits the Sun at a distance of 42.9–47.8 AU once every 305 years and 3 months (111,504 days), similar to Makemake, Chaos and other bodies that circle the Sun in 6:11 resonance to Neptune. Its orbit has an eccentricity of 0.05 and an inclination of 26° with respect to the ecliptic.
Using the best-fit values for its orbit, it is expected to come to perihelion in 2109. It has been observed 28 times over 3 oppositions and has an uncertainty code of 5. As of 2016, is 46.1 AU from the Sun. The body's spectral type as well as its rotation period remain unknown.
Brown assumes an albedo of 0.10, resulting in an estimated diameter of 600 kilometers. However, because the albedo is unknown and it has a preliminary absolute magnitude of 4.0, its diameter could easily fall between 420 and 940 km for an assumed albedo between 0.25 and 0.05, respectively.