2010 TJ
|
Asteroid 2010 TJ |
|
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type |
SDO , "Distant Object" |
| Major semi-axis | 62,701 AU |
| eccentricity | 0.364 |
| Perihelion - aphelion | 39.876 AU - 85.526 AU |
| Inclination of the orbit plane | 39 ° |
| Length of the ascending node | 91.2 ° |
| Argument of the periapsis | 273.6 ° |
| Time of passage of the perihelion | September 8, 2000 |
| Sidereal period | 496 a 6.0 M |
| Mean orbital velocity | 3.731 km / s |
| Physical Properties | |
| Medium diameter | approx. 457 km |
| Albedo | 0.06-0.09 |
| Absolute brightness | 5.4 - 5.8 mag |
| history | |
| Explorer |
David L. Rabinowitz Megan E. Schwamb Suzanne W. Tourtellotte |
| Date of discovery | October 2, 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 TJ is a large trans-Neptunian object that is classified as a Scattered Disk Object (SDO) in terms of its orbit dynamics . Because of its size, the asteroid is a dwarf planet candidate .
discovery
2010 TJ was discovered on October 2, 2010 by a team of astronomers consisting of Dave Rabinowitz , Meg Schwamb and Suzanne Tourtellotte at the La Silla Observatory ( Chile ) of the European Southern Observatory .
The observation sheet of the asteroid begins with the official discovery observation on October 2, 2010. In September 2018, a total of 73 observations over a period of 8 years were available. The previously last observation was in December 2017 at the Lowell Observatory ( Arizona performed). (As of March 2, 2019)
properties
Orbit
2010 TJ orbits the sun in 496.50 years in an elliptical orbit between 39.88 AU and 85.53 AU from its center. The orbit eccentricity is 0.364, the orbit is 38.95 ° inclined to the ecliptic . The planetoid is currently 41.36 AU from the sun. He passed through perihelion for the last time in 2000, so the next perihelion should take place in 2497.
Both Marc Buie ( DES ) and the Minor Planet Center classify the planetoid as SDO ; the latter also lists it generally as a "distant object" .
size
A diameter of 457 km is currently assumed, based on a reflectivity of 6% and an absolute brightness of 5.4 m . Assuming a diameter of 457 km, this results in a total surface of around 656,000 km². The apparent magnitude of 2010 TJ is 21.97 m .
Since it can be assumed that 2010 TJ 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 believes that 2010 TJ may be a dwarf planet.
| year | Dimensions km | source |
|---|---|---|
| 2018 | 306.0 | Johnston |
| 2018 | 457.0 | 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 10TJ . SwRI (Space Science Department). Retrieved March 2, 2019.
- ↑ a b MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 2, 2019.
- ↑ a b c 2010 TJ at the IAU Minor Planet Center (English). Accessed March 2, 2019.
- ↑ v ≈ π * a / period (1 + sqrt (1-e²))
- ↑ 2010 TJ in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 2, 2019.
- ↑ 2010 TJ 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 2, 2019.
- ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 2, 2019.