(523763) 2014 WZ 509

from Wikipedia, the free encyclopedia
Asteroid
(523763) 2014 WZ 509
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type DO (E SDO ), or
CKBO («Hot»)
«Distant Object»
Major semi-axis 40.183  AU
eccentricity 0.096
Perihelion - aphelion 36.33 AU - 44.036 AU
Inclination of the orbit plane 15.9 °
Length of the ascending node 251.4 °
Argument of the periapsis 60.4 °
Time of passage of the perihelion January 28, 2137
Sidereal period 254 a 8.6 M
Mean orbital velocity 4.660 km / s
Physical Properties
Medium diameter approx. 373 km
Albedo 0.08-0.09
Absolute brightness 5.5 - 5.6 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery November 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.

(523763) 2014 WZ 509 is a large trans-Neptunian object in the Kuiper belt , which is classified as an extended Scattered Disk Object (DO) or as a Cubewano (CKBO) in terms of railway dynamics. Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2014 WZ 509 was discovered on November 29, 2014 by a team of astronomers , consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, on images of the 1.8 m Pan-STARRS telescope ( PS1), made on December 23, 2011, discovered at Haleakalā Observatory ( Maui ). The discovery was announced on July 17, 2016 the asteroid was given on 25 September by the IAU , the Minor Planet -number five hundred twenty-three thousand seven hundred sixty-three .

After its discovery, WZ 509 could be identified on photos up to November 15, 2010, which were also taken as part of the Pan-STARRS program, and thus its observation period was extended by four 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, a total of 178 observations were made over a period of 8 years. The last observation so far was also carried out in March 2018 on the Pan-STARRS telescope (PS1). (As of March 13, 2019)

properties

Orbit

2014 WZ 509 orbits the sun in 254.72 years on a slightly elliptical orbit between 36.33  AU and 44.04 AU from its center. The orbit eccentricity is 0.096, the orbit is inclined 15.90 ° with respect to the ecliptic . The planetoid is currently 43.94 AU from the Sun. The next time it passes through perihelion in 2137, the last perihelion is likely to have occurred in 1882.

Marc Buie ( DES ) classifies the planetoid as an 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, however, lists him as Cubewano , whereby he would belong to the "hot" classic KBO in terms of rail dynamics .

size

A diameter of 373 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.6  m . Based on this diameter, the total surface area is around 437,000 km 2 . The apparent brightness of 2014 WZ 509 is 22.08  m .

Since it is conceivable that 2014 WZ 509 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 expects that it is at 2014 WZ 509 to perhaps is a dwarf planet.

Determination of the diameter for 2014 WZ 509
year Dimensions km source
2018 352.0 Johnston
2018 373.0 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 523763 . SwRI (Space Science Department). Retrieved March 13, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved March 13, 2019.
  3. ↑ a b c (523763) 2014 WZ509 at IAU Minor Planet Center (English) Retrieved March 13, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-0169: 2014 WZ509 . IAU . July 17, 2016. Retrieved March 13, 2019.
  6. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 13, 2019.
  7. ↑ (523763) 2014 WZ509 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 13, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  8. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 13, 2019.
  9. ↑ (523763) 2014 WZ509 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 13, 2019.