2013 CD 223
|
Asteroid 2013 CD 223 |
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type |
Plutino , "Distant Object" |
| Major semi-axis | 39,352 AU |
| eccentricity | 0.226 |
| Perihelion - aphelion | 30.451 AU - 48.253 AU |
| Inclination of the orbit plane | 5.3 ° |
| Length of the ascending node | 73.7 ° |
| Argument of the periapsis | 260 ° |
| Time of passage of the perihelion | January 2, 2042 |
| Sidereal period | 246 a 10.3 M |
| Mean orbital velocity | 4.709 km / s |
| Physical Properties | |
| Medium diameter | approx. 329 km |
| Albedo | 0.08-0.09 |
| Absolute brightness | 5.5 - 5.8 mag |
| history | |
| Explorer |
Pan-STARRS : B. Gibson T. Goggia N. Primak A. Schultz M. Willman |
| Date of discovery | February 9, 2013 |
| 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. | |
2013 CD 223 is a large trans-Neptunian object in the Kuiper Belt , which is classified as Plutino in terms of orbital dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .
discovery
2013 CD 223 was acquired on February 9, 2013 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, in 2013 CD 223 could be identified on photos taken as part of the Sloan Digital Sky Survey program (SDSS) at the Apache Point Observatory ( New Mexico ) going back to January 19, 2005, thus changing its observation period eight years to more accurately calculate its orbit. Since then the planetoid has only been observed through the Pan-STARRS telescope. In March 2018, there were a total of 24 observations over a period of 10 years. The last observation so far was carried out again on the Pan-STARRS telescope in February 2014. (As of March 25, 2019)
properties
Orbit
2013 CD 223 orbits the sun in 246.86 years in an elliptical orbit between 30.45 AU and 48.25 AU from its center. The orbital eccentricity is 0.226, the orbit is 5.28 ° inclined to the ecliptic . The planetoid is currently 48.25 AU from the sun. He will next pass perihelion in 2042, so the last perihelion should have occurred in 1895.
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 area is around 340,000 km². The apparent brightness of 2013 CD 223 is 22.64 m .
Since it is conceivable that 2013 CD 223 is in hydrostatic equilibrium due to its size and could thus be largely round, it may meet the criteria for classification as a dwarf planet . Mike Brown believes that it is in 2013 CD 223 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 13CD223 . 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 2013 CD223 at the IAU Minor Planet Center (English) Retrieved on March 25, 2019.
- ↑ v ≈ π * a / period (1 + sqrt (1-e²))
- ↑ MPC : MPEC 2016-0378: 2013 CD223 . IAU . July 26, 2016. Retrieved March 25, 2019.
- ↑ 2013 CD223 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.
- ↑ 2013 CD223 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 25, 2019.