(148209) 2000 CR 105

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Asteroid
(148209) 2000 CR 105
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type ETNO / EDDO
SDO ,
"Distant Object"
Major semi-axis 217,959  AU
eccentricity 0.797
Perihelion - aphelion 44,176 AU - 391,742 AU
Inclination of the orbit plane 22.8 °
Length of the ascending node 128.4 °
Argument of the periapsis 316.7 °
Time of passage of the perihelion February 18, 1965
Sidereal period 3217 a 10.6 M
Mean orbital velocity 2.001 km / s
Physical Properties
Medium diameter approx. 316 km
Absolute brightness 6.3 - 6.6 mag
history
Explorer Marc W. Buie
Date of discovery February 6, 2000
Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items.

2000 CR 105 is a large Trans-Neptunian Object , the web dynamically as "Extreme trans-Neptunian object" (ETNO and EDDO) and as scattered disc object is classified (SDO). Due to its size, the asteroid is one of the dwarf planet candidates .

discovery

2000 CR 105 was discovered on February 6, 2000 by Marc Buie as part of the Deep Ecliptic Survey with the 4 m Mayall telescope of the Kitt Peak Observatory ( Arizona ). The planetoid was later given the minor planet number 148209 by the IAU .

The observation arc of the planetoid begins with the official discovery observation on February 6, 2000. Since then, the planetoid has been observed through various earth-based telescopes. In May 2018, a total of 57 observations were made over a period of 16 years. The last observation so far was made in April 2015 at the Kitt Peak Observatory. (As of March 26, 2019)

properties

Orbit

2000 CR 105 orbits the sun in 3217.88 years in a highly elliptical orbit between 44.17  AU and 391.74 AU from its center. The orbit eccentricity is 0.797, the orbit is inclined 22.80 ° to the ecliptic . The planetoid is currently 62.13 AU from the Sun. He passed through perihelion for the last time in 1965, so the next perihelion should take place in 5183.

Due to the extreme orbital elements, 2000 CR 105 is one of the "Extreme trans-Neptunian objects" (ETNO), which can typically be divided into three groups and have semi-axes of at least 150 AU and perihelion over 38 AU. Like Sedna , which was found in 2003 , the asteroid distant from the Sun differs from other scattered disk objects in that its perihelion is no longer within the direct gravity influence of the planet Neptune . 2000 CR 105 is one of the celestial bodies that led to the search for the hypothetical planet nine . In the event of its existence, 2000 CR 105 could be gravitationally influenced by this planet.

Both Marc Buie ( DES ) and the Minor Planet Center classify the planetoid as SDO ; the latter also generally lists it as a "distant object" . The Johnston's Archive lists it as "Extreme Detached Disk Object" (EDDO) (also referred to as Extreme Detached Objects (EDO)), which form a subgroup of the ETNO due to their comparatively high perihelion and high orbital eccentricity.

size

A diameter of 316 km is currently assumed, based on a reflectivity of 4% and an absolute brightness of 6.6  m . Based on this diameter, the total area is about 314,000 km². The apparent brightness of 2000 CR 105 is 24.11  m , the mean surface temperature is estimated at 19 K (−254 ° C) based on the distance from the sun  .

Since it is conceivable that 2000 CR 105 is in hydrostatic equilibrium due to its size and could therefore be largely round, it may meet the criteria for classification as a dwarf planet . Mike Brown expects that it is at 2000 CR 105 to perhaps is a dwarf planet.

2000 CR 105 seems to have a bluish (neutral) coloration, which is why the albedo is assumed to be comparatively low.

Determination of the diameter for 2000 CR 105
year Dimensions km source
2018 243.0 Johnston
2018 316.0 Brown
The most precise determination is marked in bold .

See also

Web links

Individual evidence

  1. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 26, 2019.
  2. ^ A b Marc W. Buie : Orbit Fit and Astrometric record for 00CR105 . SwRI (Space Science Department). Retrieved March 26, 2019.
  3. ↑ a b MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 26, 2019.
  4. ↑ a b MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Accessed March 26, 2019.
  5. ↑ a b c (148209) 2000 CR105 at the IAU Minor Planet Center (English) Accessed March 26, 2019.
  6. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  7. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 26, 2019.
  8. ↑ (148209) 2000 CR105 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 26, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  9. ↑ (148209) 2000 CR105 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  10. ↑ a b c Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 26, 2019.