(524049) 2000 CQ 105

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Asteroid
2000 CQ 105
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type SDO ,
"Distant Object"
Major semi-axis 57.118  AU
eccentricity 0.396
Perihelion - aphelion 34.501 AU - 79.734 AU
Inclination of the orbit plane 19.7 °
Length of the ascending node 130.7 °
Argument of the periapsis 103.4 °
Time of passage of the perihelion December 11, 2062
Sidereal period 431 a 8.2 M
Mean orbital velocity 3.909 km / s
Physical Properties
Medium diameter approx. 344 km
Albedo 0.04-0.09
Absolute brightness 6.3 - 6.4 mag
Spectral class C
B-R = 1.100
history
Explorer Marc W. Buie or
JW Parker
Date of discovery February 5, 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 CQ 105 is a large trans-Neptunian object that is classified as a Scattered Disk Object (SDO) in terms of its orbit dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2000 CQ 105 was discovered on February 5, 2000 by a team of astronomers led by Marc Buie or by J. W. Parker with the 2.1-m reflector telescope at the Kitt Peak Observatory ( Arizona ). The discovery was announced on March 16, 2000, with the planetoid only being given the provisional designation 2000 CQ 105 on December 21, 2000 .

The observation arc of the planetoid begins with the official discovery observation on February 5, 2000. Since then, the planetoid has been observed through various earth-based telescopes. In December 2018, there were a total of 62 observations over a period of 19 years. The last observation so far was carried out in March 2018 at the Pan-STARRS Telescope (PS1) ( Maui ). (As of March 19, 2019)

properties

Orbit

2000 CQ 105 orbits the sun in 431.68 years in a strongly elliptical orbit between 34.50  AU and 79.73 AU from its center. The orbit eccentricity is 0.396, the orbit is 19.72 ° inclined to the ecliptic . The planetoid is currently 44.16 AU from the sun. He will next pass perihelion in 2062, so the last perihelion should have occurred in 1631.

Both Marc Buie ( DES ) and the Minor Planet Center classify the planetoid as SDO ; the latter also generally lists it as a “distant object” .

size

A diameter of 344 km is currently assumed, based on a reflectivity of 4% and an absolute brightness of 6.4  m . Based on this diameter, the total surface area is around 372,000 km 2 .

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

2000 CQ 105 appears to have a bluish (neutral) color, which is why the albedo is assumed to be comparatively low.

Determination of the diameter for 2000 CQ 105
year Dimensions km source
2018 267.0 Johnston
2018 344.0 Brown
The most precise determination is marked in bold .

See also

Web links

Individual evidence

  1. ^ A b Marc W. Buie : Orbit Fit and Astrometric record for 00CQ105 . SwRI (Space Science Department). Retrieved March 19, 2019.
  2. ↑ a b MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Retrieved March 19, 2019.
  3. ↑ a b MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 19, 2019.
  4. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 19, 2019.
  5. ↑ a b c (524049) 2000 CQ105 at the IAU Minor Planet Center (English). Retrieved March 19, 2019.
  6. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  7. ↑ MPC : MPEC 2000-F07: Five TNOs . IAU . March 16, 2000. Retrieved March 19, 2019.
  8. ↑ MPC : MPEC 2000-Y27: 2000 CQ105 . IAU . December 21, 2000. Retrieved March 19, 2019.
  9. ↑ (524049) 2000 CQ105 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 19, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  10. ↑ a b c Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 19, 2019.