1999 CL 119
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Asteroid 1999 CL 119 |
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | DO (E SDO ), or CKBO ( «Hot» ) «Distant Object» |
| Major semi-axis | 46.8 AU |
| eccentricity | 0.008 |
| Perihelion - aphelion | 46.414 AU - 47.185 AU |
| Inclination of the orbit plane | 23.3 ° |
| Length of the ascending node | 23.4 ° |
| Argument of the periapsis | 221.1 ° |
| Time of passage of the perihelion | February 20, 2076 |
| Sidereal period | 320 a 2.0 M |
| Mean orbital velocity | 4,318 km / s |
| Physical Properties | |
| Medium diameter | approx. 359 km |
| Albedo | 0.04-0.09 |
| Absolute brightness | 6.2 - 6.3 mag |
| history | |
| Explorer | Christian Veillet John B. McDonald |
| Date of discovery | February 11, 1999 |
| 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. | |
1999 CL 119 is a large trans-Neptunian object in the Kuiper belt , which is classified as an extended Scattered Disk Object (DO) or as a Cubewano (CKBO) in terms of orbital dynamics. Due to its size, the asteroid may be one of the dwarf planet candidates .
discovery
1999 CL 119 was discovered on February 11, 1999 by Christian Veillet and John B. McDonald with the 3.6 m CFHT telescope at the Mauna Kea Observatory ( Hawaii ). The discovery was announced on January 2, 2000 along with the 1999 CN 119 and 1999 CX 131 .
The observation arc of the asteroid begins with the official observation on February 11, 1999. Since then, the asteroid has been observed by various earth-based telescopes. In April 2017, a total of 27 observations over a period of 15 years were available. The last observation so far was carried out in April 2017 at the Pan-STARRS telescope (PS1) ( Maui ). (As of March 15, 2019)
properties
Orbit
1999 CL 119 orbits the sun in 320.17 years in an almost circular orbit between 46.41 AU and 47.19 AU from its center. The orbital eccentricity is 0.008, the orbit is 23.34 ° inclined to the ecliptic . The planetoid is currently 46.63 AU from the Sun. He will next pass through perihelion in 2076, so the last perihelion should have occurred in 1755.
Marc Buie ( DES ) classifies the planetoid as an extended SDO (ESDO or DO ), while the Minor Planet Center him as Cubewano classifies, where he ground dynamically to the "hot" classical KBO heard; the latter also lists it as a non-SDO and generally as a “distant object” .
size
A diameter of 359 km is currently assumed, based on a reflectivity of 4% and an absolute brightness of 6.3 m . Based on this diameter, the total area is around 405,000 km². The apparent magnitude of 1999 CL 119 is 22.66 m .
Since it is conceivable that 1999 CL 119 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 believes that it is in 1999 CL 119 to perhaps is a dwarf planet.
1999 CL 119 seems to have a bluish (neutral) coloration, which is why the albedo is assumed to be comparatively low.
| year | Dimensions km | source |
|---|---|---|
| 2018 | 280.0 | Johnston |
| 2018 | 359.0 | Brown |
| The most precise determination is marked in bold . | ||
See also
- List of trans-Neptunian objects
- List of dwarf planets of the solar system
- List of asteroids
- List of moons from asteroids
Web links
- How many dwarf planets are there in the outer solar system? Current list of the largest TNOs from Mike Brown
- Free the dwarf planets! Mike Brown's column on the IAU and the dwarf planets regarding their classifications (23 August 2011)
Individual evidence
- ^ A b Marc W. Buie : Orbit Fit and Astrometric record for 99CL119 . SwRI (Space Science Department). Retrieved March 15, 2019.
- ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 15, 2019.
- ↑ a b c 1999 CL119 at the IAU Minor Planet Center (English) Retrieved March 15, 2019.
- ↑ v ≈ π * a / period (1 + sqrt (1-e²))
- ↑ MPC : MPEC 2000-A04: 1999 CL119, 1999 CN119, 1999 CX131 . IAU . January 2, 2000. Retrieved March 15, 2019.
- ↑ 1999 CL119 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 15, 2019.
- ↑ MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Retrieved March 15, 2019.
- ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 15, 2019.
- ↑ 1999 CL119 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- ↑ a b c Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 15, 2019.