(523760) 2014 WQ 509

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Asteroid
(523760) 2014 WQ 509
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type Plutino ,
"Distant Object"
Major semi-axis 39.178  AU
eccentricity 0.146
Perihelion - aphelion 33.468 AU - 44.889 AU
Inclination of the orbit plane 9.8 °
Length of the ascending node 40.8 °
Argument of the periapsis 209.4 °
Time of passage of the perihelion November 30, 2109
Sidereal period 245 a 2.8 M
Mean orbital velocity 4.720 km / s
Physical Properties
Medium diameter approx. 329 km
Albedo 0.08-0.09
Absolute brightness 5.7 - 5.8 mag
history
Explorer Pan-STARRS :
B. Gibson
T. Goggia
N. Primak
A. Schultz
M. Willman
Date of discovery 17th November 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.

(523760) 2014 WQ 509 is a large trans-Neptunian object in the Kuiper Belt , which is classified as Plutino in terms of orbital dynamics . Due to its size, the asteroid may be one of the dwarf planet candidates .

discovery

2014 WQ 509 was discovered on November 17, 2014 by a team of astronomers , consisting of B. Gibson, T. Goggia, N. Primak, A. Schultz and M. Willman, in images taken as part of the Pan-STARRS project with the 1 , 8 m Ritchey Chretien Telescope (PS1) at Haleakalā Observatory ( Maui ) on January 1, 2013, discovered. The discovery was announced on July 17, 2016 the asteroid was on 25 September 2018 the IAU , the Minor Planet -number 523,760 .

After its discovery in 2014, WQ 509 could be identified on photos, which were also taken as part of the Pan-STARRS program, going back to January 3, 2012 and thus its observation period was extended by two 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 64 observations over a period of 7 years. The last observation so far was carried out again on the Pan-STARRS telescope in February 2018. (As of March 24, 2019)

properties

Orbit

2014 WQ 509 orbits the sun in 245.23 years on a slightly elliptical orbit between 33.46  AU and 44.89 AU from its center. The orbit eccentricity is 0.146, the orbit is 9.82 ° inclined to the ecliptic . The planetoid is currently 43.46 AU from the Sun. The next time it passes through perihelion in 2109, the last perihelion should have been in 1864.

Marc Buie ( DES ) classifies the planetoid as Plutino ( 2: 3 resonance with Neptune ), while the Minor Planet Center does not have a specific classification; the latter lists it as a non-SDO and generally as a “distant object” .

size

A diameter of 329 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 5.8  m . Based on this diameter, the total surface area is around 340,000 km 2 . The apparent magnitude of 2014 WQ 509 is 22.39  m .

Since it is conceivable that 2014 WQ 509 will be 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 believes that it is in 2014 WQ 509 to perhaps is a dwarf planet.

Determinations of the diameter for 2014 WQ 509
year Dimensions km source
2018 321.0 Johnston
2018 329.0 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 523760 . SwRI (Space Science Department). Retrieved March 24, 2019.
  2. ↑ a b c Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Accessed March 24, 2019.
  3. ↑ a b c (523760) 2014 WQ509 at the IAU Minor Planet Center (English) Accessed March 24, 2019.
  4. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  5. ↑ MPC : MPEC 2016-O160: 2014 WQ509 . IAU . July 17, 2016. Accessed March 24, 2019.
  6. ↑ MPC : MPC / MPO / MPS Archive . IAU . Retrieved March 24, 2019. Reference there: MPC 111778
  7. ↑ (523760) 2014 WQ509 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved March 24, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  8. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved March 24, 2019.
  9. ↑ (523760) 2014 WQ509 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 24, 2019.