2010 RF 188
|
Asteroid 2010 RF 188 |
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type |
SDO , "Distant Object" |
| Major semi-axis | 46.672 AU |
| eccentricity | 0.294 |
| Perihelion - aphelion | 32.974 AU - 60.37 AU |
| Inclination of the orbit plane | 13.9 ° |
| Length of the ascending node | 178.3 ° |
| Argument of the periapsis | 333.3 ° |
| Time of passage of the perihelion | November 7, 2119 |
| Sidereal period | 318 a 10.3 M |
| Mean orbital velocity | 4,324 km / s |
| Physical Properties | |
| Medium diameter | approx. 468 km |
| Albedo | 0.07-0.09 |
| Absolute brightness | 5.2 - 5.3 mag |
| history | |
| Explorer |
Pan-STARRS : B. Gibson T. Goggia N. Primak A. Schultz M. Willman |
| Date of discovery | September 15, 2010 |
| 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. | |
2010 RF 188 is a large trans-Neptunian object in the Kuiper Belt , which is classified as a Scattered Disk Object (SDO) in terms of orbital dynamics . Because of its size, the asteroid is a dwarf planet candidate .
discovery
2010 RF 188 was discovered on September 15, 2010 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 26, 2016.
After its discovery, RF 188 could be identified in photos up to November 12, 2001, which were taken as part of the Digitized Sky Survey program at the Apache Point Observatory , and thus its observation period was extended by nine years calculate its orbit more precisely. In October 2018, a total of 88 observations were made over a period of 8 years. The last observation so far was again carried out in November 2017 at the Pan-STARRS telescope. (As of February 26, 2019)
properties
Orbit
2010 RF 188 orbits the sun in 318.86 years in an elliptical orbit between 32.97 AU and 60.37 AU from its center. The orbit eccentricity is 0.293, the orbit is inclined 13.86 ° to the ecliptic . The planetoid is currently 54.93 AU from the sun. The next time it passes through perihelion in 2119, the last perihelion should have occurred in 1800.
Marc Buie ( DES ) classifies the planetoid as SDO , while the Minor Planet Center classifies it generally as a “Distant Object” and as a non-SDO. The Johnston's Archive lists it as "other TNO" , which means it is definitely not a Cubewano or Resonantes KBO .
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 km². The apparent magnitude of 2010 RF 188 is 22.59 m .
Since it can be assumed that 2010 RF 188 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 2010 RF 188 to possibly is a dwarf planet.
| year | Dimensions km | source |
|---|---|---|
| 2018 | 464.0 | 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 10RF188 . SwRI (Space Science Department). Retrieved February 26, 2019.
- ↑ a b c 2010 RF188 at the IAU Minor Planet Center (English) Retrieved on February 26, 2019.
- ↑ v ≈ π * a / period (1 + sqrt (1-e²))
- ↑ MPC : MPEC 2016-O316: 2010 RF188 . IAU . July 26, 2016. Retrieved February 26, 2019.
- ↑ 2010 RF188 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved February 26, 2019.
- ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved February 26, 2019.
- ^ A b Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved February 26, 2019.
- ↑ 2010 RF188 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 26, 2019.