41. Ketakar suggested that Uranus, Neptune and his hypothetical trans-Neptunian planets were locked in Laplace-like resonances. 42. Orcus straddles the edge for trans-Neptunian objects massive enough to retain volatiles such as methane on the surface. 43. After the resonant configuration is destabilized by interactions with the trans-Neptunian belt a series of gravitational encounters occur. 44. IAU Resolution 6a of 2006 recognizes Pluto as " the prototype of a new category of trans-Neptunian objects ". 45. Was discovered by the ESSENCE supernova survey on November 6, 2004 observing with the 4 m trans-Neptunian object. 46. Is estimated to be about in diameter, assuming a typical albedo of 0.09 for trans-Neptunian objects. 47. It is one of the brighter Trans-Neptunian objects, being the 34th brightest Cubewano as of 23 July 2016. 48. The name " cubewano " derives from the first trans-Neptunian object ( TNO ) found after Pluto and Charon,. 49. The column on the right includes some notable planets, dwarf planets, asteroids, and trans-Neptunian objects for comparison. 50. Some sixty years after the discovery of Pluto, a large number of large trans-Neptunian objects began to be discovered.
