(148209) 2000 CR105
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Discovery[1] and designation
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| Discovered by | Marc W. Buie |
| Discovery date | February 6, 2000 |
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Designations
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| Alternate name(s) | none |
| Minor planet category |
E-SDO (detached object)[1] |
| Epoch 2011-Aug-27 (JD 2455800.5) | |
| Aphelion | 403.3 AU (60.330 Tm) |
| Perihelion | 44.03 AU (6.586 Tm) |
| Semi-major axis | 223.7 AU (33.460 Tm) |
| Eccentricity | 0.80316 |
| Orbital period | 3,345.87 yr (1,222,078 d) |
| Average orbital speed | 1.63 km/s |
| Mean anomaly | 4.997° |
| Inclination | 22.765° |
| Longitude of ascending node | 128.2° |
| Argument of perihelion | 316.5° |
| Dimensions | 253 km[3] or 375 km[4] |
| Geometric albedo | 0.10?[citation needed] |
| Temperature | ~19 K |
| Apparent magnitude | 23.8[5] |
| Absolute magnitude (H) | 6.1[2] |
(148209) 2000 CR105, also written as (148209) 2000 CR105, is currently about the seventh-most-distant known object in the Solar System.[6] Considered a detached object,[7][8] it orbits the Sun in a highly eccentric orbit every 3345 years at an average distance of 223 astronomical units (AU).[2]
Suggested diameters of 2000 CR105 are 253 km[3] and 375 km.[4]
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.[9][10]
- They were pulled from their original positions by a very distant and as-yet-undiscovered (albeit unlikely) giant planet.[11]
- They were pulled from their original positions by an as-yet-undiscovered companion star orbiting the Sun: see Nemesis (hypothetical star).[11]
- They were captured from another planetary system during a close encounter early in the Sun's history.[9] 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.[9]
[edit] See also
[edit] References
- ^ a b Marc W. Buie (2006-12-21). "Orbit Fit and Astrometric record for 148209". SwRI (Space Science Department). http://www.boulder.swri.edu/~buie/kbo/astrom/148209.html. Retrieved 2008-07-18.
- ^ a b c "JPL Small-Body Database Browser: 148209 (2000 CR105)". http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2000CR105. Retrieved 2008-02-20.
- ^ a b "List of Known Trans-Neptunian Objects". Johnston's Archive. http://www.johnstonsarchive.net/astro/tnoslist.html. Retrieved 2006-12-14.
- ^ a b How many dwarf planets are there in the outer solar system? Accessed 2011-11-21
- ^ "AstDys (148209) 2000CR105 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 2009-04-18. http://www.webcitation.org/query?id=1240086930520647. 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 currently 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.
- ^ a b c 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.
- ^ a b 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)
[edit] External links
- Orbital simulation from JPL (Java) / Ephemeris
- Orbit Determination of 2000 CR105
- Spacecraft escaping the Solar System (Heavens-Above)
- World Book: Worlds Beyond Pluto
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