2014 WP 509

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Asteroid
2014 WP 509
Properties of the orbit ( animation )
Epoch:  April 27, 2019 ( JD 2,458,600.5)
Orbit type CKBO  ("Hot")  ,
"Distant Object"
Major semi-axis 44.714  AU
eccentricity 0.086
Perihelion - aphelion 40.876 AU - 48.551 AU
Inclination of the orbit plane 8.4 °
Length of the ascending node 66.8 °
Argument of the periapsis 334.3 °
Time of passage of the perihelion February 25, 1975
Sidereal period 299 a 0 M
Mean orbital velocity 4.418 km / s
Physical Properties
Medium diameter approx. 513 km
Albedo 0.08-0.09
Absolute brightness 4.5 - 4.9 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.

2014 WP 509 is a large trans-Neptunian object , which is classified as Cubewano in terms of railway dynamics . Because of its size, the asteroid is a dwarf planet candidate .

discovery

2014 WP 509 was examined on November 17, 2014 by an astronomical team , 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 October 23, 2010, discovered at Haleakalā Observatory ( Maui ). The discovery was announced on July 24, 2016.

The asteroid's observation arc begins with the official discovery observation in October 2010. In September 2018, a total of 81 observations were made over a period of 6 years. The last observation so far was carried out in February 2016 on the Pan-STARRS telescope. (As of February 9, 2019)

properties

Orbit

2014 WP 509 orbits the sun in 299.00 years on a strongly elliptical orbit between 40.88  AU and 48.55 AU from its center. The orbit eccentricity is 0.086, the orbit is 8.36 ° inclined to the ecliptic . The planetoid is currently 42.62 AU from the Sun and 41.85 AU from Earth . He last passed through perihelion in 1975, so the next perihelion should take place in 2274.

Both Marc Buie ( DES ) and the Minor Planet Center classify the planetoid as a Cubewano ; the latter also generally lists it as a “distant object” and as a non- SDO . 2014 WP 509 is one of the hot Cubewanos, which has nothing to do with temperature, but means that the orbit of the planetoid has been disturbed by the planet Neptune since its formation .

size

A diameter of around 513 km is currently assumed, based on a reflectivity of 8% and an absolute brightness of 4.9  m . The apparent brightness of 2014 WP 509 is 20.99  m .

Since it can be assumed that 2014 WP 509 is in hydrostatic equilibrium due to its size and therefore has to be largely round, it should meet the criteria for classification as a dwarf planet . Mike Brown assumes that 2014 WP 509 is likely a dwarf planet.

Provisions of the diameter for 2014 WP 509
year Dimensions km source
2018 558.0 Johnston
2018 513.0 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 14WP509 . SwRI (Space Science Department). Retrieved February 9, 2019.
  2. ↑ a b c 2014 WP509 at the IAU Minor Planet Center (English) Retrieved on February 9, 2019.
  3. ↑ v ≈ π * a / period (1 + sqrt (1-e²))
  4. ^ MPC : MPC List Of Transneptunian Objects . IAU . Retrieved February 9, 2019.
  5. ↑ MPC : MPEC 2016-O292: 2014 WP509 . IAU . July 24, 2016. Retrieved February 9, 2019.
  6. ↑ 2014 WP509 in the Small-Body Database of the Jet Propulsion Laboratory (English). Retrieved February 9, 2019. Template: JPL Small-Body Database Browser / Maintenance / Alt
  7. ↑ MPC : MPEC List Of Centaurs and Scattered-Disk Objects . IAU . Retrieved February 9, 2019.
  8. ↑ 2014 WP509 in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
  9. ↑ a b Mike Brown : How many dwarf planets are there in the outer solar system? . CalTech . November 12, 2018. Retrieved February 9, 2019.
  10. ^ Wm. R. Johnston: List of Known Trans-Neptunian Objects . Johnston's Archives. October 7, 2018. Retrieved February 9, 2019.