(523778) 2014 YK 50

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Asteroid
(523778) 2014 YK 50
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type SDO ,
"Distant Object"
Major semi-axis 119.645  AU
eccentricity 0.674
Perihelion - aphelion 38.961 AU - 200.329 AU
Inclination of the orbit plane 29.6 °
Length of the ascending node 27.9 °
Argument of the periapsis 169.5 °
Time of passage of the perihelion January 14, 2023
Sidereal period 1308 a 8.9 m
Mean orbital velocity 2.701 km / s
Physical Properties
Medium diameter approx. 315 km
Albedo 0.08-0.09
Absolute brightness 5.9 likes
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery December 29, 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.

(523778) 2014 YK 50 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 is one of the dwarf planet candidates .

discovery

2014 YK 50 was discovered on December 29, 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 the asteroid was on 25 September 2018 the IAU , the Minor Planet -number five hundred twenty-three thousand seven hundred seventy-eight .

After its discovery, in 2014, YK 50 could be identified on photos, which were also taken as part of the Pan-STARRS, going back to January 27, 2011, thus extending its observation period by three years in order to calculate its orbit more precisely. So far, the planetoid has only been observed through the Pan-STARRS telescope. In October 2018, there were a total of 123 observations over a period of 8 years. The last observation so far was carried out again at the Pan-STARRS telescope in April 2018. (As of March 26, 2019)

properties

Orbit

2014 YK 50 orbits the sun in 1308.74 years in a strongly elliptical orbit between 38.96  AU and 200.33 AU from its center. The orbit eccentricity is 0.674, the orbit is inclined 29.60 ° with respect to the ecliptic . The planetoid is currently 39.09 AU from the Sun. He will next pass perihelion in 2023, so the last perihelion should have occurred in 714.

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 315 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.9  m . Based on this diameter, the total surface area is around 312,000 km 2 . The apparent magnitude of 2014 YK 50 is 21.89  m .

Since it is conceivable that 2014 YK 50 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 YK 50 to perhaps is a dwarf planet.

Provisions of the diameter for 2014 YK 50
year Dimensions km source
2018 293.0 Johnston
2018 315.0 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 523778 . SwRI (Space Science Department). Retrieved March 26, 2019.
  2. ↑ a b MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 26, 2019.
  3. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 26, 2019.
  4. ↑ a b c (523778) 2014 YK50 at the IAU Minor Planet Center (English). Accessed March 26, 2019.
  5. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  6. ↑ MPC : MPEC 2016-O256: 2014 YK50 . IAU . July 17, 2016. Accessed March 26, 2019.
  7. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 26, 2019. Reference there: MPC 111779
  8. ↑ (523778) 2014 YK50 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 26, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  9. ↑ (523778) 2014 YK50 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 26, 2019.