2000 CC 4
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Asteroid 2000 KK 4 |
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|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | DO (E SDO ) or CKBO ( «Hot» ), «Distant Object» |
| Major semi-axis | 41.55 AU |
| eccentricity | 0.076 |
| Perihelion - aphelion | 38,394 AU - 44,706 AU |
| Inclination of the orbit plane | 19.1 ° |
| Length of the ascending node | 146.1 ° |
| Argument of the periapsis | 303.7 ° |
| Time of passage of the perihelion | July 29, 1891 |
| Sidereal period | 267 a 10.0 M |
| Mean orbital velocity | 4.583 km / s |
| Physical Properties | |
| Medium diameter | approx. 344 km |
| Albedo | 0.04-0.09 |
| Absolute brightness | 6.4 mag |
| Spectral class | C B-R = 1.550 |
| history | |
| Explorer |
Matthew J. Holman Brett J. Gladman John J. Kavelaars |
| Date of discovery | May 26, 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 KK 4 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 rail dynamics. Due to its size, the asteroid may be one of the dwarf planet candidates .
discovery
2000 KK 4 was on 26 May 2000 by a team of astronomers consisting of Matthew Holman , Brett Gladman and JJ Kavelaars , the putty-Peak National Observatory ( Arizona discovered). The discovery was announced on February 17, 2001 along with 2000 CN 105 and 2000 FA 8 .
The observation arc of the planetoid begins with the official observation on May 26, 2000. Since then, the planetoid has been observed through various earth-based telescopes. In December 2018, there were a total of 54 observations over a period of 18 years. The last observation so far was carried out in August 2017 at the Pan-STARRS telescope (PS1) ( Maui ). (As of March 19, 2019)
properties
Orbit
2000 KK 4 orbits the sun in 267.83 years on a slightly elliptical orbit between 38.39 AU and 44.71 AU from its center. The orbital eccentricity is 0.076, the orbit is 19.11 ° inclined to the ecliptic . The planetoid is currently 44.68 AU from the Sun. He last passed through perihelion in 1891, so the next perihelion is likely to take place in 2159.
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 would belong; the latter also classifies it as a non-SDO and generally 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 area is about 372,000 km². The apparent magnitude of 2000 KK 4 is 22.76 m .
Since it is conceivable that 2000 KK 4 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 KK 4 to perhaps is a dwarf planet.
2000 KK 4 seems to have a bluish (neutral) color, which is why the albedo is assumed to be comparatively low.
| year | Dimensions km | source |
|---|---|---|
| 2018 | 267.0 | Johnston |
| 2018 | 344.0 | 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 00KK4 . SwRI (Space Science Department). Retrieved March 19, 2019.
- ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 19, 2019.
- ↑ a b c 2000 KK4 at the IAU Minor Planet Center (English) Retrieved on March 19, 2019.
- ↑ v ≈ π * a / period (1 + sqrt (1-e²))
- ↑ MPC : MPEC 2001-D06: 2000 CN105, 2000 FA8, 2000 KK4 . IAU . February 17, 2001. Retrieved March 19, 2019.
- ↑ 2000 KK4 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 19, 2019.
- ↑ MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Retrieved March 19, 2019.
- ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 19, 2019.
- ↑ 2000 KK4 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 19, 2019.