2014 JR 80
|
Asteroid 2014 JR 80 |
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type |
Plutino , "Distant Object" |
| Major semi-axis | 39,592 AU |
| eccentricity | 0.088 |
| Perihelion - aphelion | 36.106 AU - 43.078 AU |
| Inclination of the orbit plane | 15.3 ° |
| Length of the ascending node | 119.2 ° |
| Argument of the periapsis | 296 ° |
| Time of passage of the perihelion | July 7, 2094 |
| Sidereal period | 249 a 1.4 M. |
| Mean orbital velocity | 4.695 km / s |
| Physical Properties | |
| Medium diameter | approx. 468 km |
| Albedo | 0.07-0.09 |
| Absolute brightness | 5.1 - 5.3 mag |
| history | |
| Explorer |
Pan-STARRS : B. Gibson T. Goggia N. Primak A. Schultz M. Willman |
| Date of discovery | May 6, 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 JR 80 is a large trans-Neptunian object in the Kuiper Belt , which is classified as Plutino in terms of orbital dynamics . Because of its size, the asteroid is a dwarf planet candidate .
discovery
2014 JR 80 was discovered on May 6, 2014 by a team of astronomers 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, JP 80 could be identified on photos up to June 21, 2010, which were also taken as part of the Pan-STARRS program, and thus its observation period was extended by four years in order to calculate its orbit more precisely. In September 2018, a total of 151 observations were made over a period of 8 years. The last observation so far was again carried out in May 2018 at the Pan-STARRS telescope. (As of February 26, 2019)
properties
Orbit
2014 JR 80 orbits the sun in 249.12 years on a slightly elliptical orbit between 36.11 AU and 43.08 AU from its center. The orbit eccentricity is 0.088, the orbit is inclined 15.35 ° to the ecliptic . The planetoid is currently 40.99 AU from the sun. He will next pass perihelion in 2094, so the last perihelion should have occurred in 1845.
Marc Buie ( DES ) classifies the planetoid as Plutino , while the Minor Planet Center classifies it as a non-SDO and generally as a “distant object” .
size
A diameter of around 468 km is currently assumed, based on a reflectivity of 7% and an absolute brightness of 5.3 m . Assuming a diameter of 468 km, this results in a total surface of around 688,000 km 2 . The apparent magnitude of 2014 JR 80 is 21.41 m .
Since it can be assumed that 2014 JR 80 is in hydrostatic equilibrium due to its size and must therefore be largely round, it should meet the criteria for classification as a dwarf planet . Mike Brown expects that it is at 2014 JR 80 to possibly is a dwarf planet.
| year | Dimensions km | source |
|---|---|---|
| 2018 | 423.0 | Johnston |
| 2018 | 468.0 | 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 14JR80 . SwRI (Space Science Department). Retrieved February 27, 2019.
- ↑ a b c 2014 JR80 at the IAU Minor Planet Center (English) Retrieved on February 27, 2019.
- ↑ v ≈ π * a / period (1 + sqrt (1-e²))
- ↑ MPC : MPEC 2016-O211: 2014 JR80 . IAU . July 17, 2016. Retrieved February 27, 2019.
- ↑ 2014 JR80 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved February 27, 2019.
- ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved February 26, 2019.
- ↑ 2014 JR80 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 February 27, 2019.
- ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved February 27, 2019.