(148209) 2000 CR105 explained
| Minorplanet: | yes |
| Background: | - C2E0FF
|
|
| Discovery Ref: | [1] |
| Discovered: | 6 February 2000 |
| Epoch: | 13 January 2016 (JD 2457400.5) |
| Aphelion: | 411.62abbr=onNaNabbr=on (Q) |
| Perihelion: | 44.286AU (q) |
| Semimajor: | 227.95AU (a) |
| Eccentricity: | 0.80572 (e) |
| Inclination: | 22.71773° (i) |
| Asc Node: | 128.24627° (Ω) |
| Arg Peri: | 317.219° (ω) |
| Mean Anomaly: | 5.28267° (M) |
| Magnitude: | 23.8 |
| Abs Magnitude: | 6.3 |
| Albedo: | 0.04 (expected) |
| Mean Motion: | / day (n) |
| Observation Arc: | 5547 days (15.19 yr) |
| Earliest Precovery Date: | 6 February 2000 |
| Uncertainty: | 2 |
is a trans-Neptunian object and the tenth-most-distant known object in the Solar System . Considered a detached object,[2] [3] it orbits the Sun in a highly eccentric orbit every 3,305 years at an average distance of 222 astronomical units (AU).
Description
See also: List of Solar System objects most distant from the Sun. Mike Brown's website lists it as a possible dwarf planet with a diameter of 328km (204miles) based on an assumed albedo of 0.04 . The albedo is expected to be low because the object has a blue (neutral) color. However, if the albedo is higher, the object could easily be half that size.
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.[4] [5]
- 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 undiscovered companion star orbiting the Sun such as Nemesis.
- They were captured from another planetary system during a close encounter early in the Sun's history.[4] 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. is estimated to be 2–3 times more likely to be a captured planetary object than Sedna.[4]
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 . It is one of eleven objects known with a semi-major axis greater than 100 AU and perihelion beyond 42 AU. It may be influenced by Planet Nine.
See also
External links
Notes and References
- Web site: List of numbered minor planets . Harvard University . Center for Astronomy.
- Book: Jewitt, David . Morbidelli, Alessandro . Rauer, Heike . 2007 . Trans-Neptunian Objects and Comets . Saas-Fee Advanced Course . 35 . Swiss Society for Astrophysics and Astronomy . Berlin . Springer . 978-3-540-71957-1 . 86.
- Lykawka, Patryk Sofia . Mukai, Tadashi . July 2007 . Dynamical classification of trans-Neptunian objects: Probing their origin, evolution, and interrelation . Icarus . 189 . 1 . 213–232 . 10.1016/j.icarus.2007.01.001. 2007Icar..189..213L .
- Scott J. . Kenyon . Benjamin C. . Bromley . 2004 . Nature . 432 . 7017 . 598–602 . Stellar encounters as the origin of distant Solar System objects in highly eccentric orbits . astro-ph/0412030 . 10.1038/nature03136 . 2004Natur.432..598K . 15577903. 4427211 .
- Alessandro . Morbidelli . Harold F. . Levison . 2004 . Scenarios for the Origin of the Orbits of the Trans-Neptunian Objects 2000 CR105 and 2003 VB12 (Sedna) . The Astronomical Journal . 128 . 5 . 2564–2576 . astro-ph/0403358 . 2004AJ....128.2564M . 10.1086/424617. 119486916 .
