(523749) 2014 UR 224

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Asteroid
(523749) 2014 UR 224
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type SDO ,
"Distant Object"
Major semi-axis 50,062  AU
eccentricity 0.217
Perihelion - aphelion 39.212 AU - 60.913 AU
Inclination of the orbit plane 10.7 °
Length of the ascending node 244.2 °
Argument of the periapsis 208.5 °
Time of passage of the perihelion April 16, 2033
Sidereal period 354 a 2.6 M.
Mean orbital velocity 4.175 km / s
Physical Properties
Medium diameter approx. 358 km
Albedo 0.08-0.09
Absolute brightness 5.5 - 5.7 mag
history
Explorer Pan-STARRS
Date of discovery October 26, 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.

(523749) 2014 UR 224 is a large trans-Neptunian object that is classified as a scattered disk object (SDO) in terms of orbital dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2014 UR 224 was discovered on October 26, 2014 by a team of astronomers in images taken as part of the Pan-STARRS project at the Haleakalā Observatory ( Maui ) on October 29, 2010. The discovery was announced on July 17, 2016 by an astronomical team consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman (Pan-STARRS), the planetoid received on September 25, 2018 from the IAU the minor planet number 523749 .

The observation arc of the planetoid begins with the official observation on October 29, 2010. Since then, the planetoid has been observed through various earth-based telescopes. In October 2018, a total of 156 observations were made over a period of 8 years. The last observation so far was also carried out in January 2018 on the Pan-STARRS telescope (PS1). (As of March 18, 2019)

properties

Orbit

2014 UR 224 orbits the sun in 354.22 years in an almost circular orbit between 39.21  AU and 60.91 AU from its center. The orbit eccentricity is 0.217, the orbit is inclined 10.70 ° with respect to the ecliptic . The planetoid is currently 39.75 AU from the sun. He will next pass perihelion in 2033, so the last perihelion should have occurred in 1679.

Both Marc Buie ( DES ) and the Minor Planet Center classify the planetoid as SDO ; the latter also generally lists it as a “distant object” .

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 surface area is around 403,000 km 2 . The apparent magnitude of 2014 UR 224 is 21.80  m .

Since it is conceivable that 2014 UR 224 will be in hydrostatic equilibrium due to its size and thus could be largely round, it may meet the criteria for classification as a dwarf planet . Mike Brown believes that it is in 2014 UR 224 to perhaps is a dwarf planet.

Provisions of the diameter for 2014 UR 224
year Dimensions km source
2018 352.0 Johnston
2018 358.0 Brown
The most precise determination is marked in bold .

See also

Web links

Individual evidence

  1. ^ A b Marc W. Buie : Orbit Fit and Astrometric record for 523749 . SwRI (Space Science Department). Retrieved March 18, 2019.
  2. ↑ a b MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 18, 2019.
  3. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 18, 2019.
  4. ↑ a b c (523749) 2014 UR224 at the IAU Minor Planet Center (English) Retrieved March 18, 2019.
  5. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  6. ↑ MPC : MPEC 2016-0159: 2014 UR224 . IAU . July 17, 2016. Accessed March 18, 2019.
  7. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 18, 2019. Reference there: MPC 111779
  8. ↑ (523749) 2014 UR224 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 18, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  9. ↑ (523749) 2014 UR224 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.