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(148209) 2000 CR105

Trans-Neptunian object

Field	Value
minorplanet	yes
background	#C2E0FF
image	File:Planet_nine_15_etno2_2017.png
caption	is seen as a smaller orbit center left in red with hypothetical Planet Nine in green
name
discovery_ref
discoverer	Marc W. Buie
discovered	6 February 2000
alt_names
mp_category	{{Hlist
(detached object)<ref name	Buie/
orbit_ref
epoch	21 November 2025 (JD 2461000.5)
aphelion	413.29 AU (Q)
perihelion	44.117 AU (q)
semimajor	228.70 AU (a)
eccentricity	0.8071 (e)
period	{{ubl
3305 yr (barycentric)<ref name	barycenter/
inclination	22.713° (i)
asc_node	128.212° (Ω)
arg_peri	316.919° (ω)
mean_anomaly	6.289° (M)
dimensions	{{Ubl
327 km<ref name	BrownDP/
223 km?<ref name	"tnolist"/
magnitude	24.38
abs_magnitude	6.14
spectral_type	{{Ubl
Blue<ref name	BrownDP/
B–V {{	}}
V–R {{	}}
albedo	0.04 (assumed)
mean_motion	/ day (n)
observation_arc	5547 days (15.19 yr)
earliest_precovery_date	6 February 2000
uncertainty	3

| TNO | E-SDO | (detached object) | yr ( d) | 3305 yr (barycentric) | 327 km | 223 km? | Blue | B–V
| V–R
**** is a trans-Neptunian object. Considered a detached object, it orbits the Sun in a highly eccentric orbit every 3,305 years at an average distance of 222 astronomical units (AU).

Description

Mike Brown's website lists it with a diameter of 327 km 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.
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. is estimated to be 2–3 times more likely to be a captured planetary object than Sedna.

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 may be influenced by Planet Nine.

References

"List of numbered minor planets". Harvard University.
(2007). "Trans-Neptunian Objects and Comets". Springer.
(July 2007). "Dynamical classification of trans-Neptunian objects: Probing their origin, evolution, and interrelation". Icarus.
(2004). "Stellar encounters as the origin of distant Solar System objects in highly eccentric orbits". Nature.
(2005). "A wide-binary solar companion as a possible origin of Sedna-like objects". Earth, Moon, and Planets.
Marc W. Buie. (2025-09-28). "Orbit Fit and Astrometric record for 148209". SwRI (Space Science Department).
(2021-04-13). "JPL Small-Body Database Browser: 148209 (2000 CR105)".
(2025-06-19). "List of known trans-Neptunian objects". Johnston's Archive.
Brown, Michael E.. "How many dwarf planets are there in the outer solar system? (updates daily)". [[California Institute of Technology]].

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

scattered-disc-and-detached-objects extreme-trans-neptunian-objects discoveries-by-marc-buie astronomical-objects-discovered-in-2000

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