(148209) 2000 CR105, also written as (148209) 2000 CR105, is currently about the seventh-most-distant known object in the Solar System. Considered a detached object, it orbits the Sun in a highly eccentric orbit every 3345 years at an average distance of 223 astronomical units (AU).
Suggested diameters of 2000 CR105 are 253 km and 375 km.
2000 CR105 and Sedna differ from scattered-disc objects in that they are not within the gravitational influence of the planet Neptune at their perihelion distances. It is something of a mystery 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 passing star.
- They were pulled from their original positions by a very distant and as-yet-undiscovered (albeit unlikely) giant planet.
- They were pulled from their original positions by an as-yet-undiscovered companion star orbiting the Sun: see Nemesis (hypothetical star).
- They were captured from another planetary system during a close encounter early in the Sun's history. 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. 2000 CR105 is estimated to be 2–3 times more likely to be a captured planetary object than Sedna.