2014 OE 394
|
Asteroid 2014 OE 394 |
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type |
CKBO ( "Cold" ) "Distant Object" |
| Major semi-axis | 46.714 AU |
| eccentricity | 0.12 |
| Perihelion - aphelion | 41.097 AU - 52.332 AU |
| Inclination of the orbit plane | 3.9 ° |
| Length of the ascending node | 309 ° |
| Argument of the periapsis | 262.7 ° |
| Time of passage of the perihelion | February 10, 1957 |
| Sidereal period | 319 a 3.5 M. |
| Mean orbital velocity | 4.322 km / s |
| Physical Properties | |
| Medium diameter | approx. 304 km |
| Albedo | 0.09-0.20 |
| Absolute brightness | 4.8 - 5.0 mag |
| history | |
| Explorer |
Pan-STARRS : B. Gibson T. Goggia N. Primak A. Schultz M. Willman |
| Date of discovery | July 28, 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 OE 394 is a large trans-Neptunian object in the Kuiper belt that is classified as Cubewano (CKBO) in terms of railway dynamics . Due to its size, the asteroid is one of the dwarf planet candidates .
discovery
2014 OE 394 was discovered on July 28, 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, in 2014 OE 394 could be identified on photos, which were also taken as part of the Pan-STARRS program, going back to June 19, 2010 and thus extended its observation period by four years in order to calculate its orbit more precisely. So far, the planetoid has only been observed through the Pan-STARRS telescope. In September 2018, a total of 151 observations were made over a period of 8 years. The last observation so far was carried out again at the Pan-STARRS telescope in May 2018. (As of March 28, 2019)
properties
Orbit
2014 OE 394 orbits the sun in 319.29 years on a slightly elliptical orbit between 41.09 AU and 52.33 AU from its center. The orbit eccentricity is 0.120, the orbit is 3.91 ° inclined to the ecliptic . The planetoid is currently 45.43 AU from the sun. The next time he went through perihelion in 1957, the last perihelion should have occurred in 2276.
Marc Buie ( DES ) classifies the asteroid as a Cubewano , whereby it belongs to the orbital dynamics "cold" classical KBO , 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” .
size
A diameter of 304 km is currently assumed, based on a reflectivity of 20% and an absolute brightness of 5.0 m . Based on this diameter, the total surface area is around 290,000 km 2 .
Since it is conceivable that 2014 OE 394 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 OE 394 to perhaps is a dwarf planet.
| year | Dimensions km | source |
|---|---|---|
| 2018 | 486.0 | Johnston |
| 2018 | 304.0 | 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 14OE394 . SwRI (Space Science Department). Retrieved March 28, 2019.
- ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 28, 2019.
- ↑ a b c 2014 OE394 at the IAU Minor Planet Center (English) Retrieved on March 28, 2019.
- ↑ v ≈ π * a / period (1 + sqrt (1-e²))
- ↑ MPC : MPEC 2016-O95: 2014 OE394 . IAU . July 17, 2016. Accessed March 28, 2019.
- ↑ 2014 OE394 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 28, 2019.
- ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 28, 2019.
- ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 28, 2019.