|Discovery site Palomar Obs.|
MPC designation 2007 JH43
|Discovery date 10 May 2007|
Observation arc 31.34 yr (11,446 days)
|Discovered by Palomar Obs.
M. E. Schwamb
M. E. Brown
D. L. Rabinowitz|
Minor planet category TNO · Plutino SDO (DES)
(470308) 2007 JH43, provisional designation 2007 JH43, is a trans-Neptunian object in the outer regions of the Solar System, approximately 500 kilometers in diameter. It was discovered on 10 May 2007, by the U.S. Palomar Observatory in California. The team of unaccredited astronomers at Palomar consisted of Megan E. Schwamb, Michael E. Brown and David L. Rabinowitz
The minor planet orbits the Sun at a distance of 38.6–40.6 AU once every 249 years and 1 month (90,983 days). Its orbit has an eccentricity of 0.02 and an inclination of 18° with respect to the ecliptic. The first precovery was taken at the Australian Siding Spring Observatory during the Digitized Sky Survey in 1984, extending the body's observation arc by 23 years prior to its discovery observation. It came to perihelion around 1888. Based on an absolute magnitude of 4.5 and assuming a generic albedo for trans-Neptunian objects of 0.09, it is about 500 kilometres (310 mi) in diameter, which makes it likely a dwarf planet.
As of 2014, the Minor Planet Center listed 2007 JH43 as a plutino (a trans-Neptunian object in 2:3 mean-motion resonance with Neptune). However, the Deep Ecliptic Survey currently shows it as a scattered object, based on a 10-million-year integration of the orbit.