2010 JK ₁₂₄

Asteroid 2010 JK 124
Properties of the orbit ( animation ) Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type	SDO or DO (E SDO ), "Distant Object"
Major semi-axis	39.589  AU
eccentricity	0.036
Perihelion - aphelion	38,152 AU - 41,026 AU
Inclination of the orbit plane	15.5 °
Length of the ascending node	277.5 °
Argument of the periapsis	111.9 °
Time of passage of the perihelion	September 13, 2111
Sidereal period	249 a 1.1 M
Mean orbital velocity	4.695 km / s
Physical Properties
Medium diameter	approx. 358 km
Albedo	0.08-0.09
Absolute brightness	5.3 - 5.7 mag
history
Explorer	Chadwick A. Trujillo Andrzej Udalski Scott S. Sheppard
Date of discovery	May 11, 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 JK ₁₂₄ is a large trans-Neptunian object in the Kuiper belt , which is classified as a near or extended scattered disk object (SDO or DO) in terms of orbital dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2010 JK ₁₂₄ was discovered on May 11, 2010 by a team of astronomers consisting of Chad Trujillo , Andrzej Udalski and Scott Sheppard with the at the 1.3 m telescope of the Warsaw University at the Las Campanas Observatory ( Chile ). The discovery was announced on May 25, 2010.

The observation arc of the planetoid begins with the official discovery observation on May 11, 2010. So far, the planetoid has only been observed by the Las Campanas observatory. In April 2017, a total of 15 observations were available over a period of almost a year. The last observation so far was made in May 2011 at the Las Campanas Observatory. (As of March 18, 2019)

properties

Orbit

2010 JK ₁₂₄ orbits the sun in 249.09 years in an almost circular orbit between 38.15  AU and 41.03 AU from its center. The eccentricity of the orbit is 0.036, the orbit is inclined 15.55 ° to the ecliptic . The planetoid is currently 40.61 AU from the sun. The next time he will pass perihelion in 2111, the last perihelion will probably have occurred in 1862.

Marc Buie ( DES ) classifies the asteroid as a near ( SDO ) or 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 lists it as "other TNO" , which means it is definitely not a Cubewano or Resonantes KBO .

size

A diameter of 358 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 403,000 km². The apparent magnitude of 2010 JK ₁₂₄ is 21.52  ^m .

Since it is conceivable that 2010 JK ₁₂₄ 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 JK ₁₂₄ to perhaps is a dwarf planet.

Provisions of the diameter for 2010 JK ₁₂₄

year	Dimensions km	source
2018	386.0	Johnston
2018	358.0	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

1. ↑ ^{a b c} Marc W. Buie : Orbit Fit and Astrometric record for 10JK124 . SwRI (Space Science Department). Retrieved March 18, 2019.
2. ↑ ^{a b c} 2010 JK124 at IAU Minor Planet Center (English) Retrieved March 18, 2019.
3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
4. ↑ MPC : MPEC 2010-K61: 2010 JK124 . IAU . May 25, 2010. Retrieved March 18, 2019.
5. ↑ 2010 JK124 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 18, 2019.
6. ↑ MPC : MPEC 2010-S44: Distant Minor Planets (2010 OCT.11.0 TT) . IAU . September 25, 2010. Retrieved March 18, 2019.
7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 18, 2019.
8. ^ ^{A b} Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 18, 2019.
9. ↑ 2010 JK124 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
10. ↑ ^{a b} Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved March 18, 2019.