(148209) 2000 CR105
(148209) 2000 CR105 is a trans-Neptunian object and the tenth-most-distant known object in the Solar System as of 2015[update]. Considered a detached object, it orbits the Sun in a highly eccentric orbit every 3305 years at an average distance of 222 astronomical units (AU).
2000 CR105 is seen as a smaller orbit center left in red with hypothetical Planet Nine in green
|Discovered by||Marc W. Buie|
|Discovery date||6 February 2000|
|TNO · E-SDO|
|Epoch 13 January 2016 (JD 2457400.5)|
|Uncertainty parameter 2|
|Observation arc||5547 days (15.19 yr)|
|Earliest precovery date||6 February 2000|
|Aphelion||411.62 AU (61.577 Tm) (Q)|
|Perihelion||44.286 AU (6.6251 Tm) (q)|
|227.95 AU (34.101 Tm) (a)|
|3441.69 yr (1257076 d)|
3305 yr (barycentric)
Average orbital speed
|0° 0m 1.031s / day (n)|
|Temperature||~ 19 K|
Mike Brown's website lists it as a possible dwarf planet with a diameter of 328 kilometres (204 mi) 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.
(148209) 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.
- 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. 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.
(148209) 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°. 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.
- Marc W. Buie (2006-12-21). "Orbit Fit and Astrometric record for 148209". SwRI (Space Science Department). Retrieved 2008-07-18.
- Horizons output. "Barycentric Osculating Orbital Elements for 2000 CR105". Retrieved 2016-01-25. (Ephemeris Type:Elements and Center:@0)
- "JPL Small-Body Database Browser: 148209 (2000 CR105)". Retrieved 11 April 2016.
- Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Archived from the original on 2011-10-18. Retrieved 2014-02-16.
- "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 2014-04-05.
- "AstDys (148209) 2000CR105 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 2009-04-18. Retrieved 2009-03-16.
- 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. ISBN 3-540-71957-1.
- Lykawka, Patryk Sofia & Mukai, Tadashi. (2007). Dynamical classification of trans-neptunian objects: Probing their origin, evolution, and interrelation. Icarus Volume 189, Issue 1, July , Pages 213–232. doi:10.1016/j.icarus.2007.01.001.
- Kenyon, Scott J.; Benjamin C. Bromley (2004). "Stellar encounters as the origin of distant Solar System objects in highly eccentric orbits". Nature. 432 (7017): 598–602. arXiv:astro-ph/0412030. Bibcode:2004Natur.432..598K. doi:10.1038/nature03136. PMID 15577903.
- Morbidelli, Alessandro; 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. arXiv:astro-ph/0403358. Bibcode:2004AJ....128.2564M. doi:10.1086/424617.
- John J. Matese, Daniel P. Whitmire, and Jack J. Lissauer, "A Widebinary Solar Companion as a Possible Origin of Sedna-like Objects", Earth, Moon, and Planets, 97:459 (2005)
- "JPL Small-Body Database Search Engine: a > 150 (AU) and q > 30 (AU)". JPL Solar System Dynamics. Retrieved 2014-04-09.
- "MPC list of a>100 and q>42". IAU Minor Planet Center. Retrieved 2017-07-24.
- Brown, Mike (2016-02-12). "Why I believe in Planet Nine". FindPlanetNine.com.
- Orbit Determination of 2000 CR105
- Spacecraft escaping the Solar System (Heavens-Above)
- World Book: Worlds Beyond Pluto
- (148209) 2000 CR105 at AstDyS-2, Asteroids—Dynamic Site
- (148209) 2000 CR105 at the JPL Small-Body Database