(148209) 2000 CR105
|Discovery and designation|
|Discovered by||Marc W. Buie|
|Discovery date||February 6, 2000|
|Minor planet category||E-SDO
|Epoch 2011-Aug-27 (JD 2455800.5)|
|Aphelion||403.3 AU (Q)
|Perihelion||44.03 AU (q)
|Semi-major axis||223.7 AU (a)
|Orbital period||3,345.87 yr (1,222,078 d)|
|Average orbital speed||1.63 km/s|
|Longitude of ascending node||128.2° (Ω)|
|Argument of perihelion||316.5° (ω)|
|Geometric albedo||0.04 (expected)|
|Absolute magnitude (H)||6.3|
(148209) 2000 CR105, also written as (148209) 2000 CR105, is 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).
Mike Brown's website lists it as a possible dwarf planet with a diameter of 328 km based on an assumed albedo of 0.04. The albedo is expected to be low because the object has a blue (neutral) color. But 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 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.
- 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.
- Marc W. Buie (2006-12-21). "Orbit Fit and Astrometric record for 148209". SwRI (Space Science Department). Retrieved 2008-07-18.
- "JPL Small-Body Database Browser: 148209 (2000 CR105)". Retrieved 2008-02-20.
- Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. 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.
- (Not counting long-period comets and space probes), Eris, Sedna, 2007 OR10, 2006 QH181, 2003 QX113, and 2004 XR190 are all further from the Sun.
- 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.
- Orbital simulation from JPL (Java) / Ephemeris
- Orbit Determination of 2000 CR105
- Spacecraft escaping the Solar System (Heavens-Above)
- World Book: Worlds Beyond Pluto