(533209) 2014 DR 143
|
Asteroid 2014 DR 143 |
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type |
Plutino , "Distant Object" |
| Major semi-axis | 39.348 AU |
| eccentricity | 0.29 |
| Perihelion - aphelion | 27,952 AU - 50,743 AU |
| Inclination of the orbit plane | 10.3 ° |
| Length of the ascending node | 40 ° |
| Argument of the periapsis | 356.3 ° |
| Time of passage of the perihelion | July 19, 1925 |
| Sidereal period | 246 a 9.8 M |
| Mean orbital velocity | 4.709 km / s |
| Physical Properties | |
| Medium diameter | approx. 329 km |
| Albedo | 0.08-0.09 |
| Absolute brightness | 5.7 - 5.8 mag |
| history | |
| Explorer |
Pan-STARRS : B. Gibson T. Goggia N. Primak A. Schultz M. Willman |
| Date of discovery | February 26, 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 DR 143 is a large trans-Neptunian object in the Kuiper belt , which is classified dynamically as a Plutino crossing the Neptune orbit . Due to its size, the asteroid may be one of the dwarf planet candidates .
discovery
2014 DR 143 was discovered on February 26, 2014 by an astronomical team consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, as part of the Pan-STARRS project with the 1.8 m –Ritchey Chretien – Telescope (PS1) discovered at Haleakalā Observatory ( Maui ). The discovery was announced on July 17, 2016,
After its discovery, DR 143 could be identified in 2014 on photos, which were also taken as part of the Pan-STARRS program, going back to March 13, 2011 and thus extended its observation period by three years in order to calculate its orbit more precisely. Since then the planetoid has been observed by the Pan-STARRS and the Cerro Paranal telescope ( Chile ). In December 2018, a total of 119 observations were made over a period of 8 years. The last observation so far was carried out in April 2018 at the Pan-STARRS telescope. (As of March 25, 2019)
properties
Orbit
2014 DR 143 orbits the sun in 246.82 years in an elliptical orbit between 27.95 AU and 50.74 AU from its center. The orbital eccentricity is 0.290, the orbit is 10.27 ° inclined to the ecliptic . Currently, the planetoid is 48.79 AU from the sun. He passed perihelion for the last time in 1925, so the next perihelion is likely to take place in 2172.
Marc Buie ( DES ) classifies the planetoid as Plutino ( 2: 3 resonance with Neptune ), while the Minor Planet Center does not have a specific classification; the latter lists it as a non-SDO and generally as a “distant object” .
size
A diameter of 329 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.8 m . Based on this diameter, the total surface area is around 340,000 km 2 .
Since it is conceivable that 2014 DR 143 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 believes that it is in 2014 DR 143 to perhaps is a dwarf planet.
| year | Dimensions km | source |
|---|---|---|
| 2018 | 352.0 | Johnston |
| 2018 | 329.0 | 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 14DR143 . SwRI (Space Science Department). Retrieved March 25, 2019.
- ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 25, 2019.
- ↑ a b c (533209) 2014 DR143 at the IAU Minor Planet Center (English) Retrieved March 25, 2019.
- ↑ v ≈ π * a / period (1 + sqrt (1-e²))
- ↑ MPC : MPEC 2016-O196: 2014 DR143 . IAU . July 17, 2016. Retrieved March 25, 2019.
- ↑ (533209) 2014 DR143 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 25, 2019.
- ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 25, 2019.
- ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 25, 2019.