Mike Brown's website lists it as a possibledwarf planet with a diameter of 328 kilometres (204 mi) based on an assumedalbedo of 0.04 .[5] The albedo is expected to be low because the object has ablue (neutral) color.[5] However, if the albedo is higher, the object could easily be half that size.
(148209) 2000 CR105 andSedna differ fromscattered-disc objects in that they are not within the gravitational influence of the planetNeptune even at theirperihelion distances (closest approaches to the Sun). It is something of a mystery as to how these objects came to be in their current, far-flung orbits. Several hypotheses have been put forward:
They were pulled from their original positions by a very distant, and as-yet-undiscovered (albeit unlikely), giantplanet.[13]
They were pulled from their original positions by an undiscovered companion star orbiting the Sun such asNemesis.[13]
They were captured from anotherplanetary system during a close encounter early in the Sun's history.[11] According to Kenyon and Bromley, there is a 15% probability that a star like the Sun had an early close encounter and a 1% probability that outer planetary exchanges would have happened.(148209) 2000 CR105 is estimated to be 2–3 times more likely to be a captured planetary object than Sedna.[11]
(148209) 2000 CR105 is the first object discovered in the Solar System to have asemi-major axis exceeding 150 AU, a perihelion beyond Neptune, and anargument of perihelion of340°±55°.[14] It is one of eleven objects known with a semi-major axis greater than 100 AU and perihelion beyond 42 AU.[15] It may be influenced byPlanet Nine.[16]
^Jewitt, David; Morbidelli, Alessandro; Rauer, Heike (2007).Trans-Neptunian Objects and Comets. Swiss Society for Astrophysics and Astronomy. Saas-Fee Advanced Course. Vol. 35. Berlin: Springer. p. 86.ISBN978-3-540-71957-1.
^Lykawka, Patryk Sofia; Mukai, Tadashi (July 2007). "Dynamical classification of trans-Neptunian objects: Probing their origin, evolution, and interrelation".Icarus.189 (1):213–232.Bibcode:2007Icar..189..213L.doi:10.1016/j.icarus.2007.01.001.
^abMatese, John J.; Whitmire, Daniel P.;Lissauer, Jack J. (2005). "A wide-binary solar companion as a possible origin of Sedna-like objects".Earth, Moon, and Planets.97: 459.
