2010 RN 64
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Asteroid 2010 RN 64 |
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | DO (E SDO ) or CKBO ( «Hot» ), «Distant Object» |
| Major semi-axis | 40.843 AU |
| eccentricity | 0.081 |
| Perihelion - aphelion | 37.53 AU - 44.155 AU |
| Inclination of the orbit plane | 19.9 ° |
| Length of the ascending node | 68.4 ° |
| Argument of the periapsis | 40.9 ° |
| Time of passage of the perihelion | November 27, 2079 |
| Sidereal period | 261 a 0.2 M |
| Mean orbital velocity | 4.622 km / s |
| Physical Properties | |
| Medium diameter | approx. 343 km |
| Albedo | 0.08-0.09 |
| Absolute brightness | 5.5 - 5.7 mag |
| history | |
| Explorer | La Silla Observatory |
| Date of discovery | September 10, 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 RN 64 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 railway dynamics. Due to its size, the asteroid may be one of the dwarf planet candidates .
discovery
2010 RN 64 was discovered on September 10, 2010 by a team of astronomers at the La Silla Observatory ( Chile ) of the European Southern Observatory (ESO). The discovery was announced on October 13, 2010 after confirmation by Meg Schwamb, Dave Rabinowitz and Suzanne Tourtellotte of the Cerro Tololo Observatory (Chile).
The observation arc of the planetoid begins with the official discovery observation on September 10, 2010. Since then, the planetoid has been observed through various earth-based telescopes. In September 2018, a total of 122 observations over a period of 8 years were available. The last observation so far was carried out in January 2018 at the Pan-STARRS telescope (PS1) ( Maui ). (As of March 20, 2019)
properties
Orbit
2010 RN 64 orbits the sun in 261.02 years on a slightly elliptical orbit between 37.53 AU and 44.15 AU from its center. The orbit eccentricity is 0.081, the orbit is 19.90 ° inclined to the ecliptic . The planetoid is currently 40.75 AU from the sun. He will next pass perihelion in 2079, so the last perihelion should have occurred in 1818.
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 343 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.7 m . Based on this diameter, the total area is about 370,000 km². The apparent magnitude of 2010 RN 64 is 21.80 m .
Since it is conceivable that 2010 RN 64 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 2010 RN 64 to perhaps is a dwarf planet.
| year | Dimensions km | source |
|---|---|---|
| 2018 | 352.0 | Johnston |
| 2018 | 343.0 | 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 10RN64 . SwRI (Space Science Department). Retrieved March 20, 2019.
- ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 20, 2019.
- ↑ a b c 2010 RN64 at the IAU Minor Planet Center (English) Accessed March 20, 2019.
- ↑ v ≈ π * a / period (1 + sqrt (1-e²))
- ↑ MPC : MPEC 2010-T107: 2010 RN64 . IAU . October 13, 2010. Retrieved March 20, 2019.
- ↑ 2010 RN64 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 20, 2019.
- ↑ MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Retrieved March 20, 2019.
- ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 20, 2019.
- ↑ 2010 RN64 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 20, 2019.