(523759) 2014 WK509

(523759) 2014 WK509, provisional designation 2014 WK509 is a trans-Neptunian object and possible dwarf planet form the scattered disc, located in the outermost regions of the Solar System. It was discovered on 14 September 2010, by Pan-STARRS at Haleakala Observatory on the island of Maui, Hawaii, in the United States.[1] The object's diameter has been estimated to measure approximately 600 kilometers.[3][4]

(523759) 2014 WK509
Discovery [1]
Discovered byPan-STARRS 1
Discovery siteHaleakala Obs.
Discovery date14 September 2010
Designations
(523759) 2014 WK509
TNO [2] · SDO [3] · p-DP [4]
distant [1]
Orbital characteristics [2]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 5 [2] · 3 [1]
Observation arc3.24 yr (1,185 days)
Aphelion61.579 AU
Perihelion40.098 AU
50.838 AU
Eccentricity0.2113
362.49 yr (132,399 days)
271.50°
0° 0m 9.72s / day
Inclination14.542°
41.033°
135.10°
Physical characteristics
Mean diameter
574 km (est.)[4]
584 km (est.)[3]
0.09 (assumed)[3][4]
4.4[1][2]
4.5[4]

    Orbit and classification

    2014 WK509 belongs to the scattered disc population. It orbits the Sun at a distance of 40.1–61.6 AU once every 362 years and 6 months (132,399 days; semi-major axis of 50.8 AU). Its orbit has an eccentricity of 0.21 and an inclination of 15° with respect to the ecliptic.[2] The body's observation arc begins on 14 September 2011 at Haleakala, more than 3 years prior to its official first observation.[1] Its orbit still has a high uncertainty.[1][2]

    Numbering and naming

    This minor planet was numbered by the Minor Planet Center on 25 September 2018 (M.P.C. 111779).[5] As of 2018, it has not been named.[1]

    Physical characteristics

    Based on an absolute magnitude of 4.4,[2] and an assumed albedo of 0.09, the Johnston's archive estimates a mean-diameter of approximately 584 kilometers (363 mi),[3] while astronomer Michael Brown calculates a diameter of 574 kilometers (357 mi) using a slightly fainter magnitude of 4.5. Brown also characterizes the object as a "likely dwarf planet", an intermediate category in his classification scheme (also see list of candidates).[4]

    As of 2018, no rotational lightcurve of this object has been obtained from photometric observations. The object's rotation period, pole and shape remain unknown.[2]

    References
    1. "2014 WK509". Minor Planet Center. Retrieved 8 February 2018.
    2. "JPL Small-Body Database Browser: (2014 WK509)" (2015-01-21 last obs.). Jet Propulsion Laboratory. Retrieved 8 February 2018.
    3. Johnston, Wm. Robert (30 December 2017). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 8 February 2018.
    4. Michael E. Brown. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 8 February 2018.
    5. "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 7 October 2018.

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