(148209) 2000 CR105

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(148209) 2000 CR105
Discovery[1]
Discovered by Marc W. Buie
Discovery date February 6, 2000
Designations
2000 CR105
E-SDO
(detached object)[2]
Orbital characteristics[2][3]
Epoch 2014-Dec-09 (JD 2457000.5)
Aphelion 416.0 ±1.4 AU (Q) (60.33 Tm)
Perihelion 44.2346 ±0.0093 AU (q) (6.586 Tm)
230.12 ±0.78 AU (a) (33.46 Tm)
Eccentricity 0.80777 ±0.00067
3,491 ±18 yr (1,275,000 ±6400 d)
1.63 km/s
5.09°
Inclination 22.70702 ±0.000066 °
128.23435 ±0.00031 ° (Ω)
317.158 ±0.019° (ω)
Physical characteristics
Dimensions 328 km[4]
242 km[5]
0.04 (expected)[4]
Temperature ~ 19 K
Blue[4]
23.8 [6]
6.3 [3]

(148209) 2000 CR105, also written as (148209) 2000 CR105, is roughly the seventh-most-distant known object in the Solar System.[7] Considered a detached object,[8][9] it orbits the Sun in a highly eccentric orbit every 3345 years at an average distance of 223 astronomical units (AU).[3]

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.[4] The albedo is expected to be low because the object has a blue (neutral) color.[4] 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.[10][11]
  • They were pulled from their original positions by a very distant, and as-yet-undiscovered (albeit unlikely), giant planet.[12]
  • They were pulled from their original positions by an undiscovered companion star orbiting the Sun.[12]
  • They were captured from another planetary system during a close encounter early in the Sun's history.[10] 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.[10]

(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°.[13]

See also

References

  1. ↑ [1]
  2. ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ 3.0 3.1 3.2 Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ 4.0 4.1 4.2 4.3 4.4 Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ (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.
  8. ↑ 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.
  9. ↑ 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.
  10. ↑ 10.0 10.1 10.2 Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  12. ↑ 12.0 12.1 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)
  13. ↑ Lua error in package.lua at line 80: module 'strict' not found.

External links

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