2014 XY 40
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Asteroid 2014 XY 40 |
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | DO (E SDO ) or CKBO ( «Hot» ), «Distant Object» |
| Major semi-axis | 47,177 AU |
| eccentricity | 0.148 |
| Perihelion - aphelion | 40.172 AU - 54.181 AU |
| Inclination of the orbit plane | 29 ° |
| Length of the ascending node | 132.7 ° |
| Argument of the periapsis | 38.6 ° |
| Time of passage of the perihelion | November 23, 2153 |
| Sidereal period | 324 a 0.5 M. |
| Mean orbital velocity | 4.301 km / s |
| Physical Properties | |
| Medium diameter | approx. 447 km |
| Albedo | 0.06-0.09 |
| Absolute brightness | 5.1 - 5.5 mag |
| history | |
| Explorer | Ross Cawthon R. Ogando M. Schubnell |
| Date of discovery | 15th December 2014 |
| 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. | |
2014 XY 40 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. Because of its size, the asteroid is a dwarf planet candidate .
discovery
2014 XY 40 was discovered on December 15, 2014 by a team of astronomers consisting of Ross Cawthon, R. Ogando and M. Schubnell with the 4.0 m Víctor M. Blanco telescope (DECam) at the Cerro Tololo Observatory ( Chile ) discovered. The discovery was announced on September 30, 2016.
The asteroid's observation sheet begins with the official discovery observation on December 15, 2014. In June 2018, there were only 27 observations over a period of three years. The last observation so far was made in December 2017 at the Lowell Observatory . (As of March 6, 2019)
properties
Orbit
2014 XY 40 orbits the sun in 324.04 years on a slightly elliptical orbit between 34.62 AU and 52.58 AU from its center. The orbit eccentricity is 0.148, the orbit is 29.03 ° inclined to the ecliptic . The planetoid is currently 39.20 AU from the Sun. The next time it passes through perihelion in 2153, the last perihelion should have been in 1829.
Marc Buie ( DES ) classifies the planetoid as an extended SDO (ESDO or DO ), while the Minor Planet Center does not have a specific classification; the latter classifies it as a non-SDO and generally as a “distant object” . The Johnston's Archive, however, lists him as Cubewano , whereby he would belong to the "hot" classic KBO in terms of rail dynamics .
size
A diameter of 447 km is currently assumed, based on a reflectivity of 6% and an absolute brightness of 5.5 m . Assuming a diameter of 447 km, this results in a total surface of about 628,000 km 2 . The apparent magnitude of 2014 XY 40 is 22.59 m .
Since it can be assumed that 2014 XY 40 is in hydrostatic equilibrium due to its size and therefore must be largely round, it should meet the criteria for classification as a dwarf planet . Mike Brown believes that 2014 XY 40 may be a dwarf planet.
| year | Dimensions km | source |
|---|---|---|
| 2018 | 423.0 | Johnston |
| 2018 | 447.0 | 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 14XY40 . SwRI (Space Science Department). Retrieved March 6, 2019.
- ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 6, 2019.
- ↑ a b c 2014 XY40 at the IAU Minor Planet Center (English) Retrieved March 6, 2019.
- ↑ v ≈ π * a / period (1 + sqrt (1-e²))
- ↑ MPC : MPEC 2016-S102: 2014 XY40 . IAU . September 30, 2016. Accessed March 6, 2019.
- ↑ 2014 XY40 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 6, 2019.
- ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 6, 2019.
- ↑ 2014 XY40 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 6, 2019.