Top Qs
Timeline
Chat
Perspective
(148209) 2000 CR105
Trans-Neptunian object From Wikipedia, the free encyclopedia
Remove ads
(148209) 2000 CR105 is a trans-Neptunian object. Considered a detached object,[9][10] it orbits the Sun in a highly eccentric orbit every 3,305 years at an average distance of 222 astronomical units (AU).[4]
Remove ads
Description
Summarize
Perspective
Mike Brown's website lists it as a possible dwarf planet with a diameter of 327 kilometres (203 mi) based on an assumed albedo of 0.04.[5] The albedo is expected to be low because the object has a blue (neutral) color.[5] However, if the albedo is higher, the object could easily be half that size.
2000 CR105 and Sedna differ from scattered-disc objects in that they are not within the gravitational influence of the planet Neptune even at their perihelion 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 passing star.[11][12]
- They were pulled from their original positions by a very distant, and as-yet-undiscovered (albeit unlikely), giant planet.[13]
- They were pulled from their original positions by an undiscovered companion star orbiting the Sun such as Nemesis.[13]
- They were captured from another planetary 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. 2000 CR105 is estimated to be 2–3 times more likely to be a captured planetary object than Sedna.[11]
2000 CR105 is the first object discovered in the Solar System to have a semi-major axis exceeding 150 AU, a perihelion beyond Neptune, and an argument of perihelion of 340°±55°.[14] It may be influenced by Planet Nine.[15]
Remove ads
See also
References
External links
Wikiwand - on
Seamless Wikipedia browsing. On steroids.
Remove ads